NOS unused old-stock 1970s Speidel Mach 1 polished stainless steel expansion watch bracelet. Light surface marking from storage. The Mach 1 was worn by Dr. Matt Hooper on his Alsta Nautoscaph dive watch in the film JAWS! 18.7mm curved ends you can file to 18mm or 17mm. Spring bars included, tell us what size to send. 15.4mm band width. 6 1/4" (158mm) without a watch. No charge to shorten. We might have links to add for a charge, send a message with length you need before purchase and we'll see if it can be done. 36A.29819 .