Hamilton Railroad Auto Chrono H40656131

Hamilton
Serise:Hamilton American Classic Jazzmaster
Model:H40656131
Case:
Case Material:Stainless steel
Case Glass:Sapphire
Case Back:Open
Case Shape:Round
Case Diameter:44.00 mm
Case Height:15.30 mm
Case Lug Width:22.00 mm
W/R:50.00 m
Dial:
Dial Color:Black
Dial Indexes:Stick / Dot
Dial Hands:Alpha
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.
-The mono-block rotor is distinctively skeletonized with an ¡°H¡± shape and aviation-inspired cut-outs, a signature of individualization.
Type:Automatic
Brand:Hamilton
Caliber:H-21
Base:ETA 7750
Display:Analog
Diameter:30.00 mm
Jewels:25
Reserve:60 h
Frequency:28800 bph
Time:Hours, Minutes, Small Seconds
Date:Date, Day
Chronograph:Chronograph