This is a new complication to me, from the description: "A gentleman's 1970's Sicura calendar diving watch with concealed pen knife blade contained in a steel case, 45mm". Anyone seen any other examples of watches with concealed blades? https://www.the-saleroom.com/en-gb/...0080/lot-c758a5ed-b639-4db2-8eb2-aa4001237b0f
Different knife from the ebay files. I have never seen another integrated knife into a watch case. The Sicura version is relatively common.