ROLEX SUBMARINER DATE "RED" MARK IV Reference : 1680. Serial number: 3 405 255. Steel case, graduated rotating bezel. Black dial, painted hour markers. Service hands. Automatic mechanical movement (calibre 1570). Folded Oyster strap on folding clasp, signed. Plexiglas glass. Circa 1973. Diameter: 40 mm. A stainless steel wristwatch automatic movement, by Rolex. Circa 1973.