Welcome to the forum,
@graydog! First of all: great that you (1) ask specific questions and (2) include hi-res pictures. Folks out here will be much better able to help you this way. I'm relatively inexperienced assessing watches for authenticity, so you may want to double check with some of the heavy hitters out here. My thoughts:
Yes, and on weird places. Looks like a watchmaker had an accident during a previous service. Not the best sign, you should be able to get a 145.022-76 with a better looking dial.
I don't think so. The "Tachymetre" text on the bezel should include a accent grave: tachymètre.
See here.
No sir. Should be a 1171-633, not a 1171/1-633
Can't tell with these pictures
Serial
could be correct, but no way to know for certain without an extract from the Omega archives.
So in sum, I think you could do better with when looking for a 145.022. But that's my humble opinion..
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