Hamilton caliber H-21 [Day - Date]
| Brand: | Hamilton |
|---|---|
| Reference: | H-21 [Day - Date] |
| Base: | ETA 7750 |
| Movement: | Automatic |
| Display: | Analog |
| Diameter: | 30.00 |
| Jewels: | 25 |
| Reserve: | 60 |
| Frequency: | 28800 |
| Date: | Date, Day |
| Chronograph: | Chronograph |
| Hands: | Hours, Minutes, Small Seconds |
![Hamilton caliber H-21 [Day - Date]](https://cdn.watchbase.com/caliber/lg/origin:jpg/hamilton/h-21-1e.webp "Hamilton caliber H-21 [Day - Date]")
H-21 [Day - Date] description
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.
All watches using the Hamilton H-21 [Day - Date] movement:
H77616133
Hamilton Khaki Aviation X-Wind
H77626153
Hamilton Khaki Aviation X-Wind
H77616333
Hamilton Khaki Aviation X-Wind Black
H77646733
Hamilton Khaki Aviation X-Wind Automatic Black-Orange / Leather
H77616533
Hamilton Khaki Aviation X-Wind Black
H77696793
Hamilton Khaki Aviation X-Wind Auto Chrono Red / Carbon
H32616133
Hamilton Jazzmaster Automatic Chronograph 42mm Black Dial Bracelet
H32616533
Hamilton Jazzmaster Automatic Chronograph 42mm Black Dial
H32616153
Hamilton Jazzmaster Automatic Chronograph 42mm White Dial Bracelet
H32616553
Hamilton Jazzmaster Automatic Chronograph 42mm White Dial
H76626535
Hamilton Khaki Aviation X-Mach
H76626135
Hamilton Khaki Aviation X-Mach
H76686335
Hamilton Khaki Aviation X-Mach
H76686735
Hamilton Khaki Aviation X-Mach
H32576135
Hamilton Jazzmaster Maestro Automatic Chronograph 41mm Black Dial Bracelet
H32576515
Hamilton Jazzmaster Maestro Automatic Chronograph 41mm White Dial
H32576735
Hamilton Jazzmaster Maestro Automatic Chronograph 41mm Black Dial
H77726351
Hamilton Khaki Aviation X-Wind Automatic Silver / Rubber
H43516131
Hamilton Broadway Automatic Chronograph Steel / Grey / Bracelet
H43516731
Hamilton Broadway Automatic Chronograph Steel / Grey
H71626735
Hamilton Khaki Field Automatic Chronograph PVD / Black
H71616535
Hamilton Khaki Field Automatic Chronograph Steel / Black
H77726151
Hamilton Khaki Aviation X-Wind Automatic Silver / Bracelet
H77736733
Hamilton Khaki Aviation X-Wind Auto Chrono PVD
H71706830
Hamilton Khaki Field Auto Chrono