This may sound like the stupidest question in the world, but I just acquired a Citizens C050-088379 K Promaster yacht watch, which seems not to have been used in the last 20 years, and I cannot for the life of me figure out how to remove the back of the case to get at the battery (this a a REALLY pre- Eco-Drive). The manual is zero help: it says the back may be secured by four screws (it isn't) or be a "snapback" style case (which it is). I have tried every careful method I know of to get a blade into the separation, with absolutely NO luck. Also, I cannot find ANY visual evidence that this back has EVER been off, and there are NO case-reliefs or anything like that to facilitate removal. Any hot ideas?
Thanks!
Bart