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Carlisle Hook hook silhouette
Hook Reference › O. Mustad & Son Hooks › Mustad Hooks – 3706

O. Mustad & Son 3706

Carlisle Hook1925 or later

Evidence reviewed October 22, 2026. Marks: P photographically · V verified · I inferred · E estimated · S speculative What they mean

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Summary

Mustad Qual. 3706 is identified on surviving packaging as “Mustad-Carlisle Hooks.” Documented boxes are marked size 4 and 3/0. The “OSLO – NORWAY” wording places this packaging in 1925 or later V; exact production years remain unverified.

Photographic record

10 photographs

Mustad 3706 Carlisle Hook — point and barb detail — size 4 — bronzed finish
IMG-1Mustad 3706 Hook Point Detail Size 4 Point detail from a probable size 4 Mustad 3706, showing the concave hollow point, cut barb, and bronzed finish.

How to identify it

Original boxes identify the model with the lines “Qual. 3706,” “Hollow Point,” “Mustad-Carlisle Hooks,” and “Marked Bronzed.” The labels also carry the Key Brand key device, “OSLO – NORWAY,” a quantity of 100, and “Made in Norway.” P

Photographed hooks have a blind terminal end rather than a formed eye, a short marked or ridged section at the shank end, a deep rounded bend, a very long straight shank, a hollow inner point face, and a single cut barb. P

Technical profile and measurements

Features of the model, as recorded
FeatureRecordedEvidence
EyeBlind — Marked Shank
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Blind terminal end with a short marked or ridged section at the end of the shank. P

OBS-1OBS-8OBS-15OBS-22
WireStandard, RoundCMP-3CMP-3 compared with 214 catalogued hooks classified Standard
Shank4X Long — Marked / ridged
BendCarlisle, Narrow gap, Offset / kirbed
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Deep rounded bend identified on the original packaging as a Carlisle pattern. P

LBL-2LBL-8OBS-2OBS-9OBS-16OBS-23
PointHollow Point
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Single cut barb positioned close behind the point. P

OBS-4OBS-11OBS-18OBS-25
FinishBronzed — stated on packaging
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Bronzed finish is stated on both original box labels and visible on the photographed hooks. P

LBL-2LBL-8OBS-6OBS-13OBS-20OBS-27

The photographed 3706 hooks have a blind terminal end and a short marked or ridged section at the end of the shank. The shank is very long and straight, leading into a deep rounded bend. P

The point has a pronounced concave inner face consistent with the box wording “Hollow Point.” A single cut barb sits close behind the point. Both surviving labels state “Bronzed.” P

Measurements

Per size, with how each dimension was taken
SizeOverall lengthShank lengthGap widthBend depthWire diameterWeightShank:gap
4/0Specimen S563 mm IcaliperMEA-854 mm IcaliperMEA-914.2 mm IcaliperMEA-10 Check: The evidence record measured 14.17 mm (MEA-10).—1.22 mm IcaliperMEA-11 Check: The evidence record measured 1.22 mm (MEA-11)..75g Icaliper~3.81:1 I
3/0Specimen S360.4 mm IcaliperMEA-452.5 mm IcaliperMEA-512.5 mm IcaliperMEA-6 Check: The evidence record measured 12.5 mm (MEA-6).—1.07 mm IcaliperMEA-7 Check: The evidence record measured 1.07 mm (MEA-7)..55g Pcaliper~4.20:1 I
4Specimen S138.6 mm IcaliperMEA-130 mm Egrid photoMEA-37.1 mm IcaliperMEA-2———~4.2:1 E
Calibrated SVG True-scale preview

How hook dimensions are measuredA hook outline with dimension lines for overall length, shank length, gap, bend depth, and wire diameter.Overall lengthShank lengthGapBend depthWire diameter
Overall length
Eye to the farthest point of the bend.
Shank length
Eye to the start of the bend.
Gap
Point to shank, at right angles to the shank.
Bend depth
Shank to the bottom of the bend.
Wire diameter
Across the wire, measured by caliper where possible.
Catalog records. Photographic evidence includes two size-4 hooks, two hooks identified by a 3/0 card, two labeled boxes, and one stored-only 4/0 measurement record.

Specimens, packaging, and label

This record documents 5 specimens. Each describes itself only; none stands for every example of the model.

S1 · Size 4 specimen A

Size
4 (printed on the label)
Container
Box
Hook condition
Intact and straight; bronzed finish largely present with localized discoloration and surface roughness near the point and barb. (P)
Packaging condition
Good — moderate wear, legible
Wear
box and lid label: Box edges and corners are worn; label shows age-toning, scattered brown staining/foxing, abrasions, and darkened edges. LBL-12
Measured
size 4
Photographs
IMG-1IMG-2IMG-7IMG-10

Assignment to the individual hook within the paired size-4 photograph is probable because the hooks are not uniquely marked. I

What the label says

LBL-7 trademark · lid label, left column around key device from IMG-7
Key
Brand
LBL-8 printed · lid label, main text block from IMG-7
O. MUSTAD & SÖN
MANUFACTURERS
OSLO - NORWAY
Qual. 3706
Hollow Point
Mustad-Carlisle Hooks
Marked Bronzed
LBL-9 printed · lid label, lower left from IMG-7
100
No.
LBL-10 printed · lid label, lower right from IMG-7
Made in Norway
LBL-11 pencil · lid label, lower left after No. from IMG-7
4
Trademark
Upright key device in gold ink between “Key” and “Brand,” with an oval bow, narrow stem, and stepped right-facing bit.
As entered on the specimen record
Key
Brand
O. MUSTAD & SÖN
MANUFACTURERS
OSLO - NORWAY
Qual. 3706
Hollow Point
Mustad-Carlisle Hooks
100
No.
Marked Bronzed
Made in Norway
Layout
Key Brand device at left; manufacturer and model text centered; quantity at lower left; origin at lower right; decorative border around the label.
Printed marks
100
No.
Made in Norway
Later marks
4

Care of this specimen: Support the worn box during handling and avoid flexing the aged label or contacting the point and barb.

S2 · Size 4 specimen B

Size
4 (printed on the label)
Container
Box
Hook condition
Intact and straight; finish mostly continuous with minor age discoloration and localized wear near the point and bend. (P)
Packaging condition
Good — moderate wear, legible
Wear
box and lid label: Box edges and corners are worn; label shows age-toning, scattered brown staining/foxing, abrasions, and darkened edges. LBL-12
Photographs
IMG-7IMG-8IMG-9IMG-10

Assignment to the individual hook within the paired size-4 photograph is probable because the hooks are not uniquely marked. I

What the label says

LBL-7 trademark · lid label, left column around key device from IMG-7
Key
Brand
LBL-8 printed · lid label, main text block from IMG-7
O. MUSTAD & SÖN
MANUFACTURERS
OSLO - NORWAY
Qual. 3706
Hollow Point
Mustad-Carlisle Hooks
Marked Bronzed
LBL-9 printed · lid label, lower left from IMG-7
100
No.
LBL-10 printed · lid label, lower right from IMG-7
Made in Norway
LBL-11 pencil · lid label, lower left after No. from IMG-7
4
Trademark
Upright key device in gold ink between “Key” and “Brand,” with an oval bow, narrow stem, and stepped right-facing bit.
As entered on the specimen record
Key
Brand
O. MUSTAD & SÖN
MANUFACTURERS
OSLO - NORWAY
Qual. 3706
Hollow Point
Mustad-Carlisle Hooks
100
No.
Marked Bronzed
Made in Norway
Layout
Key Brand device at left; manufacturer and model text centered; quantity at lower left; origin at lower right; decorative border around the label.
Printed marks
100
No.
Made in Norway
Later marks
4

Care of this specimen: Support the worn box during handling and avoid flexing the aged label or contacting the point and barb.

S3 · Size 3/0 specimen A

Size
3/0 (printed on the label)
Container
Box
Hook condition
Intact; point and barb area show dark discoloration and roughened surface texture while the shank remains comparatively smooth. (P)
Packaging condition
Good — moderate wear, legible
Wear
box and lid label: Box edges and corners are worn; label and box show age-toning, scattered brown staining, and a vertical crease or lifted area near the label’s upper-right side. LBL-6
Measured
size 3/0
Photographs
IMG-3IMG-4IMG-5IMG-6

Probable match to the individually photographed 3/0 hook; the comparison photograph does not uniquely distinguish the two hooks. I

What the label says

LBL-1 trademark · lid label, left column around key device from IMG-4
Key
Brand
LBL-2 printed · lid label, main text block from IMG-4
O. MUSTAD & SÖN
MANUFACTURERS
OSLO - NORWAY
Qual. 3706
Hollow Point
Mustad-Carlisle Hooks
Marked Bronzed
LBL-3 printed · lid label, lower left from IMG-4
100
No.
LBL-4 printed · lid label, lower right from IMG-4
Made in Norway
LBL-5 handwritten · lid label, lower left beside and below 100 / No. from IMG-4
3/0
LBL-13 handwritten · identification card, upper left from IMG-3
Mustad
3706
LBL-14 handwritten · identification card, right side from IMG-3
3/0
Trademark
Upright key device in gold ink between “Key” and “Brand,” with an oval bow, narrow stem, and stepped right-facing bit.
As entered on the specimen record
Key
Brand
O. MUSTAD & SÖN
MANUFACTURERS
OSLO - NORWAY
Qual. 3706
Hollow Point
Mustad-Carlisle Hooks
100
No.
Marked Bronzed
Made in Norway
Layout
Key Brand device at left; manufacturer and model text centered; quantity at lower left; origin at lower right; decorative border around the label.
Printed marks
100
No.
Made in Norway
Later marks
3/0

Care of this specimen: Support the worn box and creased label during handling and avoid contact with the discolored point and barb area.

S4 · Size 3/0 specimen B

Size
3/0 (printed on the label)
Container
Box
Hook condition
Appears intact and straight in the comparison photograph; fine surface condition is not resolved at that scale. (P)
Packaging condition
Good — moderate wear, legible
Wear
box and lid label: Box edges and corners are worn; label and box show age-toning, scattered brown staining, and a vertical crease or lifted area near the label’s upper-right side. LBL-6
Photographs
IMG-3IMG-4

Recorded from the paired 3/0 comparison photograph; no individual close-up has been uniquely assigned to this specimen.

What the label says

LBL-1 trademark · lid label, left column around key device from IMG-4
Key
Brand
LBL-2 printed · lid label, main text block from IMG-4
O. MUSTAD & SÖN
MANUFACTURERS
OSLO - NORWAY
Qual. 3706
Hollow Point
Mustad-Carlisle Hooks
Marked Bronzed
LBL-3 printed · lid label, lower left from IMG-4
100
No.
LBL-4 printed · lid label, lower right from IMG-4
Made in Norway
LBL-5 handwritten · lid label, lower left beside and below 100 / No. from IMG-4
3/0
LBL-13 handwritten · identification card, upper left from IMG-3
Mustad
3706
LBL-14 handwritten · identification card, right side from IMG-3
3/0
Trademark
Upright key device in gold ink between “Key” and “Brand,” with an oval bow, narrow stem, and stepped right-facing bit.
As entered on the specimen record
Key
Brand
O. MUSTAD & SÖN
MANUFACTURERS
OSLO - NORWAY
Qual. 3706
Hollow Point
Mustad-Carlisle Hooks
100
No.
Marked Bronzed
Made in Norway
Layout
Key Brand device at left; manufacturer and model text centered; quantity at lower left; origin at lower right; decorative border around the label.
Printed marks
100
No.
Made in Norway
Later marks
3/0

Care of this specimen: Support the worn box and creased label during handling.

S5 · Stored 4/0 measurement record

Size
4/0 (from the existing record)
Container
Other
Measured
size 4/0

Stored-only 4/0 measurement record. No supplied photograph or package is identified as 4/0, so the size association remains unverified. I

Condition

Photographed hooks are intact and straight. Bronzed finish is largely present, with localized discoloration and surface roughness near some point and barb areas. P

Storage and Preservation

The photographed hooks are intact, but localized discoloration and surface roughness are visible around several point and barb areas. The boxes show edge wear, staining or foxing, abrasions, and localized creasing or lifting. Support the boxes during handling and avoid flexing damaged label areas.

Pattern history and manufacturer context

Series

Surviving packaging identifies the model as “Qual. 3706” and “Mustad-Carlisle Hooks.” The same labels specify “Hollow Point” and “Marked Bronzed.” P

A period catalog or price list establishing the production span, complete size range, and catalog specifications has not been documented for this entry.

Design lineage

Qual. 3706 is identified by Mustad’s own packaging as a Carlisle hook. A specific predecessor, successor, or documented model lineage is not established by the available model evidence.

Dating

Both surviving box labels read “OSLO - NORWAY.” Norway’s capital officially changed from Kristiania to Oslo on 1 January 1925, establishing 1925 as the earliest supported year for this packaging. No verified upper production date is established. V

O. Mustad & Son — The “OSLO - NORWAY” wording dates the documented packaging to 1925 or later, when the capital’s official name changed from Kristiania to Oslo. A narrower production period for Qual. 3706 is not established. V Read the maker’s history →
The Oslo Dating Clue. The “OSLO - NORWAY” wording provides a firm lower dating limit. Norway’s capital officially became Oslo on 1 January 1925, so the documented 3706 packaging dates from 1925 or later. V

Use

Primary application

The surviving packaging does not state an intended fishing application for Qual. 3706. It identifies the model as “Mustad-Carlisle Hooks,” but a specific bait, streamer, fly-pattern, or species use is not assigned without a period source. P

Collecting and buying

5 / 10CollectabilityRarity: Uncommon

Mid-tier collectability due to vintage era and complete original packaging, limited by relatively common Carlisle pattern.

The Qual. 3706 represents solid mid-century Mustad production during their industrial peak. Positive factors include the complete original packaging with intact yellow label, the pre-plastic era vintage status, and the distinctive Key Brand logo that collectors associate with classic Norwegian manufacturing. The Oslo designation places it in the post-1925 export boom period when Mustad dominated global markets.

Limiting factors include the relatively common nature of the Carlisle pattern, which was mass-produced for general bait fishing applications. While historically significant as an example of Mustad’s industrial cloning of regional patterns, it lacks the specialized appeal of salmon flies or the rarity of early Christiania-marked specimens.

Market value

Insufficient recorded sales data to estimate a reliable value.

0 sold observations recorded; 2 are needed, with the basis and date of the range, before a value is shown. Asking prices are shown as asking prices only.

Value driven primarily by packaging completeness and vintage appeal. Mint condition boxes command premium, individual hooks worth significantly less.

Where to find

Vintage tackle shows, eBay, estate sales from older anglers

Modern equivalents and related hooks

Modern equivalents
HookMatchNotes
Mustad 3261 AberdeenVery goodSimilar long shank and wide gap, but with turned-down ball eye
Eagle Claw 202 CarlisleGoodAmerican equivalent maintaining traditional Carlisle geometry

Sources, open questions, and record notes

Sources & Documentation

This specimen and its packaging — photographed, 10 images
Supports: size documentedquantity per packageconstructioneyebendfinishbarbcondition noteshook type applicationsecondary applicationsfly patternsmeasurement notescumulative records notesize measuredoverall lengthshank lengthgap widthwire diameter measuredshank gap ratiodating rangepackagingmanufacturer period contextfun fact titlefun factis snelledmeta descriptionprimary search termssummaryidentificationtechnical notesseries historydesign lineageprimary application

Open questions

  1. Do you have a Mustad catalog, price list, or dealer catalog that lists Qual. 3706?The production span, complete size range, wire gauge designation, shank-length designation, and any lateral point offset are not verified from a period model listing.Can you help? Please send a clear scan or photograph of the 3706 listing together with the catalog or price-list title, date, and page number.
  2. Can you document a Mustad 3706 box or original card marked 4/0?A stored 4/0 caliper record exists, but none of the supplied photographs or package labels is marked 4/0.Can you help? Please send photographs of the hook and its original 4/0 size marking, preferably with a measurement scale or caliper readings.
  3. Is the Mustad 3706 point laterally offset?The supplied side views do not establish whether the point is straight, kirbed, or reversed.Can you help? Please send a photograph looking directly from the blind end down the shank toward the point.
  4. Do you have a recorded sold result for an original Mustad Qual. 3706 box?No verified sold observations currently support a model-specific market value range.Can you help? Please send the sold listing or auction result with date, price, size, quantity, packaging condition, and photographs.
  5. Do you have period documentation stating the intended use of Mustad Qual. 3706?The surviving labels identify the model as a Carlisle hook but do not state a bait, fly, streamer, or species application.Can you help? Please send a period Mustad catalog, dealer catalog, advertisement, or price list that describes the intended application of Qual. 3706.

Entry last updated July 21, 2026. Entries are updated as new specimens, measurements, or documents come to light.