Biggest tell is the lume on the hands has a slightly green color, the valve is matte. I have one, great except for the hands which I plan on replacing.
I've gone through with a all gold gen in my bag. They wanted to look at it, said they can "see" through the gold. I wear a rep frequently on trips, no one has ever questioned the watch. I do usually take it off, seems like the airports I use all have body scanners.
I have a MBW 5513 and it had the same problem, had the keyless reset and it worked for a few days. Seems the Chinese took some parts out when converting for the no date model. You need a double corrector wheel. Frie part# A/8229, 8 bucks, My was changed 1.5 years ago and no further problems.