IWC Deckwatch

Very rare IWC Deckwatch
for Royal Navy
around 1940
Steel-Case with British Military Marking on the back
H.S.3 Hydrographic Service
Enamel dial with No. 4 917 (last 4 figures of movement-number)
and arabic hours-figures
Steel-hands, blued, central-seconde
Movement: gold-plated movement Cal. 52
Diameter of case: approx. 51mm
Total weight: approx. 108g

Probably only 200 pieces were produced.