Photo: Seiko The Seiko Prospex SPB143 is a unique alternate for the Submariner, as, though it might appear to be loosely modeled following the Sub, the SPB143 is, in reality, a modernized reissue from the Japanese watch brand’s 62MAS product from 1965, which not just marked Seiko’s initial dive watch, https://swissclone.com/wp-content/uploads/2023/03/image00398-1.jpeg