Bulova 1966 Goldcraft

 The date is also unknown by me

 M6 - What is the trick for opening the back ?

JD, M6= 1966 The year of mfg. There should be a small indentation on the side of the case. Carefully slip the point of a pocket knife in the indent and pry the back off. I hold the watch with a dish towel.

Bob

Yup... 1966. What is the model number stamped inside the caseback, and I may be able to ID the model name???

Best :-)   Scott

 I have discovered that the back does not come off. The case is solid. The crystal (which is plastic) comes off but now need to figure out how to get the movement out. Knob won't allow

 It will have a split winder, the crown and half the stem will stay with the case and the other half will stay in the movement, the two parts slot together so if you turn it until the slot is vertical the movement will come out with some pressure. It is fairly difficult to remove without damaging the watch if you do not really know what you are doing so be careful.

I have the same model, same year - did you ever findout the model number?

Looks like a rear open to me from the back view (look near crown, it looks like the bezel extends past the back. Look near the lugs (where the band attaches) for a small protrusion or slit where you can very carefully pop it open. looks like its marked 18k??? Nice !!!!!!

This looks like NOVA-Novice's Sea Cloud "C" except with an etched case.

http://www.mybulova.com/watches/1965-sea-cloud-c-1851

So I would say It's a 1966 Sea Cloud variation.