Piaget Ultra Rare Clamshell Case, Cal.1080, Schmitz case from 1950'sThis vintage Piaget Cal. 1080 is an incredibly rare and historically significant timepiece, distinguished by its 30mm stainless steel Clamshell casea pioneering waterproof design that remains a hidden gem among collectors. The standout feature of this watch is its Clamshell case construction, an ultra rare design that secures the case back using screws behind the lugs rather than a traditional snap on or screw down mechanism. This innovative design,