This is a very rare Omega sub second mid-size watch. Rare and nicely aged factory original finish dial. Aged blue steel original set of hands. This rare model is a CK 2023 and measures 30.8mm across excluding crown by 38mm lug tip to lug tip. The solid stainless steel case is in very good original unpolished condition. Very unique case design. The crystal is brand new. The manual wind movement is an Omega 26.5 caliber. The 15 jewels movement serial number is 8608914 dating this watch to 1937. It has been professionally serviced prior to listing. Due to its smaller case size, it will fit perfect on a smaller man's wrist or for a lady. Unsigned crown. Watch will come with a new old stock 16mm vintage genuine leather strap matching the watch perfectly. Wirst size in photo is 6 inches.