Sinn 303

Movement:

• 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

Case:

• 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

Dial:

• 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

Bracelet:

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

Warranty:

• 2 years