The A05.H31 is the Valjoux self-winding chronograph calibre that powers the Tissot PRX Chronograph. Tissot's PRX Chrono pages give it a power reserve of up to 68 hours.
Last updated 29 Oct 2026Suggest a correction
TECHNICAL SPECIFICATIONS
Movement Type
Automatic
Power Reserve
68h
Frequency
28,800 vph (4 Hz)
Display Type
Analog
COMPLICATIONS
Chronograph
QUICK FACTS
BRAND
TYPE
AutomaticSTATUS
In ProductionMANUFACTURE
ÉbaucheLAUNCH YEAR
2022BASED ON
ETA SA VALJOUX-A05-H31CALIBER FAMILY
A05FOR WATCH DEALERS
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