Hello, I've just been given an Eterna Matic 1000 (it belonged to my wife's late grandfather) and I was wondering if anyone could help me identify the model and what sort of age it might be. I've got some photos of the front, back and side but I'm not 100% sure how the back comes off (and don't want to try anything daft as it's lovely and I don't want to damage it) so I've not been able to take a photo of the movement. If anyone could advise on that then that would be really helpful.
I don't know if they all have this, but it has a nice feature to advance the date by pulling the crown out.
To my untrained and inexperienced eye it looks genuine as it has an original box and the 5 ball bearing mark on the crown, plus the original owner was not know to buy rubbish, but all opinions welcome.