Hamilton caliber H-31

Brand:Hamilton
Reference:H-31
Base: ETA 7753
Movement:Automatic
Display:Analog
Diameter:30.00
Jewels:27
Reserve:60
Frequency:28800
Date:Date
Chronograph:Chronograph
Hands:Hours, Minutes, Small Seconds
Hamilton caliber H-31

H-31 description

The Hamilton H-31 is based on the Valjoux 7753. The H-21 is similar though based on the 7750. 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.

All watches using the Hamilton H-31 movement:

Hamilton Pan Europ Auto Chrono (H35756735)

H35756735 Hamilton Pan Europ Auto Chrono
Hamilton Pan Europ Auto Chrono (H35756755)

H35756755 Hamilton Pan Europ Auto Chrono
Hamilton Khaki Pioneer Auto Chrono (H60416533)

H60416533 Hamilton Khaki Pioneer Auto Chrono
Hamilton Khaki Pioneer Auto Chrono (H60416583)

H60416583 Hamilton Khaki Pioneer Auto Chrono
Hamilton Khaki Pilot Auto Chrono (H64666135)

H64666135 Hamilton Khaki Pilot Auto Chrono
Hamilton Khaki Pilot Auto Chrono (H64666155)

H64666155 Hamilton Khaki Pilot Auto Chrono
Hamilton Khaki Pilot Auto Chrono (H64666555)

H64666555 Hamilton Khaki Pilot Auto Chrono
Hamilton Khaki Pilot Auto Chrono (H64666735)

H64666735 Hamilton Khaki Pilot Auto Chrono
Hamilton Khaki Navy Sub Auto Chrono (H78716333)

H78716333 Hamilton Khaki Navy Sub Auto Chrono
Hamilton Khaki Navy Sub Auto Chrono (H78716983)

H78716983 Hamilton Khaki Navy Sub Auto Chrono
Hamilton Khaki Pilot Pioneer Auto Chrono Black / Bracelet (H76416135)

H76416135 Hamilton Khaki Pilot Pioneer Auto Chrono Black / Bracelet
Hamilton Khaki Pilot Pioneer Auto Chrono (H76456435)

H76456435 Hamilton Khaki Pilot Pioneer Auto Chrono
Hamilton Khaki Pilot Pioneer Auto Chrono (H76416735)

H76416735 Hamilton Khaki Pilot Pioneer Auto Chrono
Hamilton Khaki Pilot Pioneer Auto Chrono (H76456955)

H76456955 Hamilton Khaki Pilot Pioneer Auto Chrono
Hamilton Khaki Pilot Pioneer Auto Chrono (H76416755)

H76416755 Hamilton Khaki Pilot Pioneer Auto Chrono
Hamilton Khaki Pilot Pioneer Auto Chrono (H76416155)

H76416155 Hamilton Khaki Pilot Pioneer Auto Chrono
Hamilton Khaki Pilot Takeoff Auto Chrono (H76786733)

H76786733 Hamilton Khaki Pilot Takeoff Auto Chrono
Hamilton Intra-Matic 68 Auto Chrono Stainless Steel / Black / Strap (H38716731)

H38716731 Hamilton Intra-Matic 68 Auto Chrono Stainless Steel / Black / Strap
Hamilton Intra-Matic 68 Auto Chrono Stainless Steel / Blue / Strap (H38416541)

H38416541 Hamilton Intra-Matic 68 Auto Chrono Stainless Steel / Blue / Strap
Hamilton Intra-Matic 68 Auto Chrono Stainless Steel / Silver / Strap (H38416711)

H38416711 Hamilton Intra-Matic 68 Auto Chrono Stainless Steel / Silver / Strap
Hamilton Intra-Matic 68 Auto Chrono Stainless Steel / Green / Strap (H38416560)

H38416560 Hamilton Intra-Matic 68 Auto Chrono Stainless Steel / Green / Strap
Hamilton Intra-Matic 68 Auto Chrono Stainless Steel / Green / Mesh (H38416160)

H38416160 Hamilton Intra-Matic 68 Auto Chrono Stainless Steel / Green / Mesh
Hamilton Intra-Matic 68 Auto Chrono Stainless Steel / Blue / Mesh (H38416141)

H38416141 Hamilton Intra-Matic 68 Auto Chrono Stainless Steel / Blue / Mesh
Hamilton Intra-Matic 68 Auto Chrono Stainless Steel / Silver / Mesh (H38416111)

H38416111 Hamilton Intra-Matic 68 Auto Chrono Stainless Steel / Silver / Mesh
Hamilton Khaki Pilot Takeoff Auto Chrono Limited Edition (H76776733)

H76776733 Hamilton Khaki Pilot Takeoff Auto Chrono Limited Edition
Hamilton Intra-Matic 68 Auto Chrono Janie Briant Today (H38426820)

H38426820 Hamilton Intra-Matic 68 Auto Chrono Janie Briant Today
Hamilton Intra-Matic 68 Auto Chrono Janie Briant Tomorrow (H38436830)

H38436830 Hamilton Intra-Matic 68 Auto Chrono Janie Briant Tomorrow