Vintage Seamaster - Need help with identification

Hello, I recently acquired an older Omega Seamaster. I've done quite a bit of research and I'm not having any luck identifying it. At first, I thought it might not be real as it is missing the words "Omega" under the symbol and from what I've found, the "Omega" is always under the symbol. However, perhaps it has just worn off? Everything else looks "right" besides that. Being a newbie, it looks like it could be ref. 166.002.

Any help you could provide in helping me figure out model/age would be greatly appreciated. Take care.

Okay, thank you. 1960s - that's a good start! I'm assuming the caseback should be removed by someone more knowledgeable than myself?

I believe this is a ref. 166.002, but it looks like it is missing the bezel. At one point, it would have had "Omega" and "Automatic" under the logo, but that seem gone due to dial wear, damage and aging.

I too think it could very well be a 166.002 that has seen water damage on the dial. The fact that the lugs look fat but the back seems polished makes me believe that someone has removed some engraving from the back at some point. If the bracelet is Omega it is worth as much (if not a tad more) than the watch.

The 165 and 166 family have a flat back. This has a stepped back. It looks like an earlier model to me but still 60s.