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Hamilton 76

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Basic Information

Name	Hamilton 76
Alternative Name	ETA 2540
Base Calibre	ETA 2540
Manufacturer	Hamilton
Launch Year	1970
Caliber Family	Description 76: manual wind 78: automatic 79: automatic, date ball-bearing rotor: 781: automatic 791: automatic, date Related calibers Hamilton 76, Hamilton 78, Hamilton 781, Hamilton 79, Hamilton 791
Is COSC certified	No

Timegrapher

Beat rate

21,600 bph

Frequency

3 Hz

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

Technical Details

Lignes Dimensions	7.75 ‴
Dimensions	17.5 mm
Height	3.3 mm
Further Measures	Mounting Diameter (Dm): 17.2mm Stem height (T): 1.65mm Mounting Height (F): 1.05mm
Power Reserve	44 hours
Frequency	21,600 vph
Jewels	17

Complications and Specifications

Shape	Round
Complications	Sweep Second
Shock Protection	Incabloc
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	1.20 x 0.70 x 0.20mm
Hand Count	3
Country Of Manufacture	United States
Notes	Other data: balance staff: U3220 stem: W3151 mainspring / battery: Zf833, 1.30 x 7.5 x 0.08 x 245mm balance staff ronda: 1213 (16s) balance staff ronda: 1214 (16s) balance staff ronda: 1217 (18s)
Signature	ca. 1970: 17 Jewels - Patented; Incabloc (ETA 2540)
Import Codes	AOH — Hamilton HYL — Hamilton VXB — Chase, Hamilton, Louis

Compatible Parts

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

108 compatible part(s) available — Supporter feature.

Metadata

Created At	Sep 15, 2023
Updated At	May 26, 2026, 4:43:51 AM