Hamilton's modified Valjoux 7753 chronograph with 60-hour power reserve. Similar to the H-21 but based on the 7753 (which differs from 7750 in subdial layout: 3, 6, 9 o'clock instead of 12, 6, 9). Features refined kinematic chain, suppressed escapement regulator, improved mainspring, and distinctive mono-block rotor skeletonized with an H-shape and aviation-inspired cut-outs. Used in Pan Europ Auto Chrono and other sportier models.
Movement Type
Automatic
Jewel Count
27 jewels
Power Reserve
60h
Frequency
28,800 vph (8 Hz)
Diameter
30mm
Height
7.9mm
Display Type
Analog
Rotor Type
bidirectional
Shock Protection
Incabloc
BRAND
HamiltonTYPE
AutomaticSTATUS
In ProductionMANUFACTURE
ÉbaucheLAUNCH YEAR
2012CALIBER FAMILY
Valjoux 7750COUNTRY
SwitzerlandALSO KNOWN AS