55.0mm diameter 17.5mm height
Brown calfskin with rivets
The caseback was solid with only an etched serial number, the 'Back' picture shown is of the movement underneath the caseback.
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The overall reductionist design, with clearly organized black background dial and luminescent hands & hour markers, leant heavily on the cockpit instrumentation of the legendary JU 52 plane. This legibility in difficult lighting conditions was paramount.