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Looks pretty cool, but I have qualms about the originality of the dial, in particular the logo and the font of "swiss made.".. also why "T Swiss made T"? Were they still using tritium in the 1970s?.... Would have to be vetted by others so don't jump on it.

 

It's a 506 movement, which was originally made by Record, who Longines took over in the early 60's. They're good, but just not as desirable to collectors. I have a 508 (day date). I can't say about the dial either.