Manufacturers of the famous Cortebert 'ATP', issued to British Army officers during the earlier years of the Second World War. The watch has a railroad sub seconds dial, as well as a minute dial, and is sometimes found with a sterile dial. The original dial has a railroad track chapter ring and sub seconds dial, and flat topped 3 and an open 4. Later MoD redials have a closed pregnant 4, curved 3, sometimes an open 9, and a sub seconds dial with tick marks. Rarely Cortebert is in capitals.
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