Description

Details

Hamilton - H40656731

Railroad Auto Chrono

Brand:	Hamilton
Family:	American Classic
Reference:	H40656731
Name:	Railroad Auto Chrono
Limited:	No

Case

Material:	Stainless Steel
Glass:	Sapphire
Back:	Open
Shape:	Round
Diameter:	44.00 mm
Height:	15.30 mm
Lug Width:	22.00 mm
W/R:	50.00 m

Dial

Color:	Black
Indexes:	Stick / Dot
Hands:	Alpha

Price in euro

Description

The Hamilton Railroad Auto Chrono is a contemporary watch that takes cues from Hamilton's rich past in supplying watches to the railways. It features a stainless steel case of 44mm, that houses the automatic caliber H-21. The dial features a spiralling tachymeter scale and time is indicated through a set of 'alpha' hands.

Movement

The Hamilton H-21 is based on the Valjoux 7750. The H-31 is similar though based on the 7753. These movements most notable change compared to the standard version is the 60 hour power reserve.

The following elements have been modified:

- The entire kinematic chain has been refined, from the barrel to the escapement
- The escapement regulator has been suppressed, facilitating optimal reliability and precision
- The main spring has been improved to increase a typical power reserve of 60 hours.

Type:	Automatic
Brand:	Hamilton
Caliber:	H-21
Base:	ETA7750
Display:	Analog
Diameter:	30.00 mm
Jewels:	25
Reserve:	60 h
Frequency:	28800 bph
Time:	Hours, Minutes, Small Seconds
Date:	Date, Day
Chronograph:	Chronograph