17 jewels42h power reserve
The Certina 13-21 is a manual winding caliber with an analog display, 17 jewels and a power reserve of 42 hours. It measures 12.4 mm in diameter. It launched in 1939. It is in production.
Last updated 29 Apr 2026Suggest a correction
TECHNICAL SPECIFICATIONS
Movement Type
Manual Winding
Jewel Count
17 jewels
Power Reserve
42h
Diameter
12.4mm
Display Type
Analog
Shock Protection
Incabloc
QUICK FACTS
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