Nice vintage Seiko 6619-8160 with "Waterproof" case back.
Super clean movement keeps good time. Tired old watch as shown by timegrapher there is positional variance but c'mon now it's old and tired like most of us and runs well enough, sets and changes over midnight as it should.
New NOS vintage Seiko crystal installed. New case back gasket.
Like many of these before, the hands were cannibalize for a diver. OEM Seiko vintage hands but not original to the model.
$50 net to me plus my actual shipping cost worldwide.
Thanks for looking !