Extremely Rare Rolex stainless steel vintage wristwatch. Black leather band. Limited production from late 1930's to mid 1940's. Manual winding. Square pushers. White patina original dial with Arabic numerals. Tachymeter scale and telemetric scales. Dual registers. Anti magnetic. Non water resistance. Case size:35mm. Case was produced by Favre Perret. Triple signed. Circa 1940. Reference: 2508

Engraving on the back: Lawrence S Ryan and Staff to Harry Wood. CA 1944.

This is the first Rolex chronograph model ever made. 

All original condition and unpolished. 

Actual photo

Accompanied by a Van Rijk certificate of authenticity and a one year warranty