I’m pretty sure that’s Jensen’s (Phong’s son) store, price seems a little high to me but it’s probably a good quality viet part. If you want to save some bucks you might consider this one
Stainless steel rotating bezel with retainer ring, friction spring, insert for older Rolex GMT 1675, 16750, 16753.Bezel is polished and ready to be installed, the insert is friction fit so it just snaps into the bezel.
I agree that that's Jensen.
That's a good lead on Ric's- at least the bezel is polished. Clark's used to have a 1675 assembly but maybe not with the insert and the bezel wasn't polished.