Hello Bulova Experts! This watch belonged to my Grandmother whom I believe purchased it new in Australia which by the case back date would be some time after 1968. I am unable to determine it's model name, and the case number of 575 hasn't turned up in the reference materials here on this fantastic website. I've been through all the advertising data for the M8 model year but I still don't see anything quite like it. I would like to identify it properly so I can obtain the correct case back gasket as the one in it now has hardened and cracked on removal. It appears to be 30.5mm inside diameter, 32.5mm outside diameter, and square in cross section. The cross section is currently 1.0mm x 0.88mm but I suppose it was once 1.0mm x 1.0mm. I see a lot of accutron case gaskets for sale about, would one of them suit? I'm also interested in identifying a replacement crystal and tension ring (if I can't move the original over to the replacement) and I also need to reseal the crown. If anyone has ideas on what dimension o-ring I can try and stuff back into the crown after I pull the stem and clean out the old remnants that would be very much appreciated.
Thanks for your help! Inboost