The current specification data sheet can be downloaded here
Crystal: Sapphire (shatter- and scratch-resistant with anti-reflective coating)
Several versions of the clock existed during the war
Offset the bezel by the required hours to track a second time zone
It is likely that the US government and the watch manufacturers of the time recognized
MWC Limited Edition Altimeter Wall Clock with High Visibility Dial, Sweep Second Hand and a Silent Quartz Movement (Size 22.5 cm / approx 9") chronograph The current specification data sheetSKU Code: CLOCK. ALT RED Originally created in 2009 as promotional items for our retailers, flying clubs, and military bases, our military themed clocks have become incredibly popular. Due to high demand, we expanded our range to offer these unique clocks for retail sale as well. Serving as excellent conversation pieces in offices, workshops, garages, reception areas, and more, this limited edition model is a unique variation of the original design.