File:Sinn 303 M.jpg Sinn 303 M km-h File:Sinn 303 M Silber.jpg Sinn 303 M-mph Silver File:Sinn 303 M RS.jpg Sinn 303 (back) The 303 M is a model railroad chronograph by Sinn .
The tachymeter of this chronograph is matched to a model railway. Thus, the speed of a fast model ICE can be measured as exact as that of a historic steam locomotive. A sympathetic additional function, that makes this watch an original and personal property of every true model railroader.
Variants: With mph classification and date in the English language; with guilloché , galvanized silver dial.
Movement:
Mechanical chronograph movement Valjoux 7750 , 28.800 A/h
Automatic Nivarox 1 hairspring, Glucydur balance wheel , Berylium plateauAntimagnetic according to DIN 8309Shock proof according to DIN 8308Case:
Stainless steel bracelet, DIN material No. 1.4435, polished, tachymeter ring satin-finished Ø 41 mm, height 16.5 mm
Sapphire crystal , with anti-glare treatment on the insideSapphire crystal caseback with printing: measured sections and standards(Optional:) Dehumidifying technology by filling the case with noble gas argon and patented dry capsule
Screw-in crown with double o-ring gasket, with crown protectionPushers with double O-ring seal and pusher protection
Waterproof to 200 mSafe below atmospheric pressure Dial:
Black mat or silber
Guilloché and elaborate silver galvanised dialIndexes coated with special long-lasting, luminous paint, fine minute scale
External tachymeter scale ring with colored engraving Functions:
Hours, minutes, small seconds with hacking seconds
Date and day of week indication in German (km/h) or English (mph) at 3 o'clock
Chronograph: 12 hours counter, 30 minutes counter, 60 seconds counter
Tachymeter scale for speeds (400 to 2 km/h or 250-1 mph) Bracelet:
Black Russia leather strap
Variant: with massive stainless steel bracelet and milled folding clasp and 30 mm overall extension Warranty:
2 years (with Ar dehumidifying technology 3 years)
