Calibre Valjoux 7750-P1 is an exclusive automatic watch movement produced by ETA for Panerai and sold as OP III, OP VIII, OP IX, OP XV, OP XXII, OPVVXI.
Self-winding movement with 21 jewels, ball-bearing rotor, unidirectional winding, 28,800 A/h, power reserve ca. 42 hours. This is a very rare variant of the Valjoux 7750, here without chronograph module.
The calibre is used exclusively by Officine Panerai in a number of models (and is there certified as a chronometer by the COSC)
Automatic movement with hours, minutes, sub seconds, date.
Automatic movement with hours, minutes, sub seconds, date, GMT hand.
Automatic movement with hours, minutes, sub seconds, date, power reserve indicator hand at 5 00.
Automatic movement with hours, minutes, sub seconds, date, depth gauge.
Automatic movement with hours, minutes, sub seconds, Agenhor perpetual calendar module.
Hand-wound movement with hours, minutes, sub seconds, 30 minute regatta timer at 3 00 via module. This is an unusual movement because it is hand-wound rather than automatic and does not use the 7750 chronograph; rather, it uses a regatta timer module. It is very like Valjoux 7761.
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