Reference

Ref. 6921

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1957 – 1959

Calibre 19AS
Power Automatic
Complication Center Seconds
Diameter (mm) 40
Lug Width (mm) 20
Case Type Screw
Case Material Steel
Dial Color Black
Dial Finishing Gloss
6921 ⤢ enlarge

6921

Notes

Longines first dive watch. Marketed as "Nautilus" Skin Diver. Piquerez SA (ESPA) case. 150m Water Resistance. Bezel is Bakelite and very fragile. Unofficial estimates claim that only 550 watches were made. Modern release the "Heritage Skin Diver" is based on this reference.

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