That's correct. In fact, the Richeville line has a long history and it's a real pity it is discontinued. I now possess two Richeville 2520 (which was the second men's model after the 2510, I believe). 2510 and 2520 are square shaped a bit like the Vintage 45 and have a very nice Art Deco look. I will post a report on my recent purchase of a black dial 2520 hopefully in Jan.
The 2710 and the 2750 have the same case with the 2750 housing a GP modified ETA automatic and the 2710 a manual GP modified Lemania movement. BTW: the earlier 2520 has the inhouse GP movement.
Later Richevilles are then the recently posted 27650 Chronograph (report to follow) and I also own the Day.Night 27610.
At the moment I'm most in love with the black 2520 square Richeville.
CC