It has nothing to do with a Constellation, however the movement may be the same movement used in some Constellations. Maybe that's what the salesman meant. If you can have the watch opened, all the information you need will be inside the case-back and on the movement,
Maybe someone else can tell you the reference number from just looking, I'm more accustomed to seeing cases like this on Geneve models. Also, with the black inlay markers, I'm more accustomed to seeing hands with some black inlay. It would be nice if you knew the reference number because then you could search for similar variants.
An acrylic crystal is correct.
No, I would definitely not buy an Omega strap, there are plenty of higher quality straps available for less from great sellers.
Click to expand...