That said, my 7S26 based Seiko diver is just about the most robust mechanical watch I have encountered. The movement is ugly, there is plastic spacer rings in the case, but I have had that watch accidentally go through the washing machine and dryer and it still ran like a champ. i disassembled it after this fiasco, and the only thing it really needed was a regulation and a new gasket (old back gasket was still ok, but it got really dry)