I got a Model 37 flat-latch with a serial number of 411xxx that must have been made aroung late 1963 or early 1964 that I love. It is a square-butt model with the original diamond magnas on it and it is a joy to shoot and carry. I do not shoot +p ammo in it but it still looks and shoots great. No blueing loss and adonized frame is still pristine as well as the hammer and trigger case-hardening. The color difference between the frame and cylinder/barrel is just enough to notice (frame is slightly darker) it but they are still a good match.Nary a sign of the frame cracking and not worried it will.
They make very nice carry-guns although I rarely carry it as I have a FEW other guns I am less afraid of getting scratched up. Enjoy yours and congrats.