16 jewels42h power reserve18,000 vph (2.5 Hz)
Caliber 81 is an automatic movement manufactured by IWC Schaffhausen. It operates at 18000 vph with a 42-hour power reserve and 16 jewels, featuring small seconds. This was IWC's first automatic caliber, produced between 1950 and 1951.
Last updated 15 Sep 2026Suggest a correction
TECHNICAL SPECIFICATIONS
Movement Type
Automatic
Jewel Count
16 jewels
Power Reserve
42h
Frequency
18,000 vph (2.5 Hz)
Display Type
Analog
FEATURES
Small Seconds
QUICK FACTS
FOR WATCH DEALERS
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