YACHTING CHRONOGRAPH GENTLEMAN'S STAINLESS STEEL WRIST WATCH

with manual wind movement, black dial and double subsidiary dials, luminous baton numerals, silver hands and orange seconds hand, on a black leather strap, No 9557, the case diameter approximately 38mm, circa 1970's 

This example is by Yema circa 1974, it was produced in very small numbers and branded as a yachting chronograph, with a Valjoux 7713 movement, this watch has a two piece case with an inner case for protection, the dial is the stand-out component of the watch and can be used as a countdown timer for yachting/regatta timing