Is this a legit Tudor movement?

[Nick9]

Found this movement inside a Tudor 7965 that dates to circa 1961.

I’ve poked around Google, and looked at Ranfft — no luck at all. Thought I’d see if the sharp eyes here can help.

So, wondering if it’s legit, and if so, if it’s period correct.

Thanks in advance, I appreciate any comments. I think I see a missing gasket...