Sinn Spezialuhren 303 M-mph Silver

The Sinn 303 M-mph Silver, reference 303.043, is a steel chronograph with a diameter of 41 mm. A model railway tachymeter in miles per hour surrounds the silver electroplated display beneath sapphire crystal. The polished case measures 17 mm thick, has a see-through back and is water resistant to 200 metres. Calibre Valjoux 7750 combines automatic winding with shock resistance. A table on the back presents kilometre-per-hour and mile-per-hour scales. The UV-resistant dial shows small seconds beside its date and weekday windows.