Asking $435 shipped US Up for sale is a decent Seamaster 600 from the 60s. Measures about 34mm in diameter with a Cal. 601. Dial and hands appear original and the dial has some light aging on the top half of the dial. It has not been serviced in my possession, but runs around -40 sec a day. I would recommend a service to be on the safe side. If you have any questions, feel free to pm me.