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Hamilton 761

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Basic Information

Name	Hamilton 761
Manufacturer	Hamilton
Launch Year	1960
Caliber Family	Description screw balance, Breguet hairspring: 750: 17 jewels 751: 17 jewels, no damaskeening 757: 22 jewels, Kif-Flector 77: 17 jewels, Kif-Flector ring balance, flat hairspring: 761: 22 jewels, Kif-Flector 780: 17 jewels, Kif-Flector, mobile stud carrier Related calibers Hamilton 750, Hamilton 751, Hamilton 757, Hamilton 761, Hamilton 77, Hamilton 780
Is COSC certified	No

Timegrapher

Beat rate

18,000 bph

Frequency

2.5 Hz

Reference: healthy amplitude ≈ 270–315° fully wound (>200° at 24 h); beat error ideally < 0.5 ms.

Technical Details

Lignes Dimensions	5.75 ‴ x 7.25 ‴
Dimensions	13.05 mm x 16.5 mm
Height	3.55 mm
Further Measures	Mounting Diameter (Dm): 13.05 x 16.2mm Stem height (T): 1.7mm Mounting Height (F): 0.9mm
Power Reserve	39 hours
Frequency	18,000 vph
Jewels	22

Complications and Specifications

Shape	Oval
Shock Protection	KIF
Regulator Type	Pinned Regulator (or Index Regulator)
Movement Type	Manual
Escapement Type	Swiss Lever
Control Type	Balance Wheel
Winding Type	Stem Winding (Crown)
Setting Type	Stem Set (Crown Pull)

Additional Information

Hand Sizes	1.00 x 0.50mm
Hand Count	2
Country Of Manufacture	United States
Notes	Other data: balance staff: U3484 mainspring / battery: Zf909, 1.35 x 6.0 x 0.07 x 180mm
Signature	ca. 1960: Hamilton 761, U.S.A., Adj., 22 Jewels; Kif-Flector
Import Codes	AOH — Hamilton HYL — Hamilton VXB — Chase, Hamilton, Louis

Compatible Parts

14 other caliber(s) share compatible parts with this caliber.

29 compatible part(s) available — Supporter feature.

Metadata

Created At	Sep 15, 2023
Updated At	Apr 23, 2025, 11:32:56 PM