Swiss nickel deck watch of the Kriegsmarine Circa 1943

Nickel deck watch with open-face by IWC Schaffhausen
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A Swiss marine observation watch of the German Kriegsmarine, circa 1943.
Nickel case, case number 1080406, factory number 1031512, and dust cover back. Very fine IWC precision lever movement calibre 67 with fine adjustment, perfectly preserved. Original enamel signed dial with markings of the Kriegsmarine, Arabic radial hours, outer minutes track, subsidiary dial for the seconds, and original blued steel hands.
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Diameter: 57 mm
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Weight: 130 g
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Signed: IWC Schaffhausen