In super condition, very small amount of wear to the 18ct gold plated top. This is the model with the two/three part case by virtue of a case ring. The movement is a mint caliber 400. The head diameter is about 33mm. Steel two part back. Unsigned contract case reminiscent of a BWC profile, it resembles an early PP Calatrava from the front. Fitted with an 18mm parallel leather strap from ZRC 110/70 so short. Nearly an Astral face with the simple crosshair seconds track. c 1956 pre-regular watch shock proofing for Smiths.

Case measurements and depth. 

Case measurement minus the crown: Approximately 33mm

Strap fitting: 18mm

Overall Thickness: 10mm