Oyster Perpetual Bubbleback 1858 — Didactic, No Reference on Case

Very early example: no reference number in the case, case signed Oyster Watch Co., and a movementMovementThe working mechanism inside a watch or clock. engraved with instructions on how to take it apart. Black dial with luminous indexes and skeleton handsSkeleton handsHands with cut-out centres that leave an open frame. This describes the hands themselves, rather than a skeletonised movement.; Rolésium case.