Just discovered that some Seiko Divers are rare and valuable. Went looking in my dresser drawer for the one I bought in Japan on R&R from Vietnam in late 1967. Sure enough it's a 6215-7000 (SerNo 7600302). I'm not a diver so it was seldom worn and not at all since 1975. Spotless face and back - slight surface scratches on the sides. When I examined it in 1975 it would not stay wound over night. A local (Tampa,Fl) dealer sent it to N.Y. for service and shortly after I got it back the strap broke and back in the dresser it went. Been wearing it the past week or so - seems to run well if a little slow (loses a minute every day or two). How do I find out what its fairly worth and safely sell it. I'm not a collector or enthusiast so I only know what I've been able to Google the past week. Would appreciate any comments. Thanks. Regards, George