Sinn 303

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Sinn 303
Sinn 303 Silver Ty
Sinn 303 Silver 12

Sinn 303 is a model range of motorist chronographs by Sinn.


Self-winding movement Valjoux 7750, 28,800 A/h
25 jewels
Nivarox 1 hairspring, Glucydur balance wheel, Berylium plateau
Mainspring Nivaflex 1, Incabloc shock protection
Shock proof according to DIN 8308
Anti-magnetic according to DIN 8309


Stainless steel, DIN material No. 4435, polished, tachymeter ring satin-finished
Ø 41 mm, height 16.5 mm
Sapphire crystal oben, with anti-glare treatment on the inside; screwed bottom
Undetachable stainless steel turning bezel with minute ratcheting
Screw-in crown with double O-ring seal, pushers with double O-ring seal
Waterproof to 200 m
Safe below atmospheric pressure


Black / silver galvanised, guilloché, indexes coated with special long-lasting, luminous paint, fine minute scale
External Tachymeter dial ring with black engraving, maximum speed limits for vehicle tires in red
Model 303 Silver 12: External 12 hours ring with black engraving
Dates at 3 o'clock, day of the week in German at 3 o'clock
Chronograph: Central second, minute in totaliser (at 12 o'clock), hour in totaliser (at 6 o'clock), stop time max. 11 hours, 59 minutes and 59 seconds


Black Russian leather strap with polished stainless steel clasp
Optional with massive stainless steel bracelet and milled folding clasp, additional 30 mm Overall prolongation


2 years