Everything looks correct on the Seamaster 752, may be a clean, unpolished case...hard to tell from the quality of pictures. The color of the hour markers is questionable as previously noted. I would ask for better pictures and for clarification that they are silver not gold. The dial finish is original and many collectors like these "sparkly" Seamasters.
If the markers are silver, you can keep the original buckle from first watch, and possibly get seller to come down to $475-500, it would be a nice deal. (If the markers are yellow/gold this would kill the deal for me.) The "sparkly" finished dials were available in same case style in day/date and date only. May just be my preference, but I think the date only version is a little more desirable/valuable.
This finish dial is also found more rarely in chronometer versions in both day/date and date only! In my opinion, Chronometer Seamasters are much more uncommon than same period Constellations, which were all chronometer movements. If I had to estimate, the ratio of Seamaster Chronometers to Constellations that I see may be 1 to 100.
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