IMO, the -7 is the best of the 1 7/8” fixed sight Model 60’s. A non magnum frame, improved yoke retention, 1/8” front sight, new heat treatment, mine has the new extractor without the locating pins.FWIW I have J-frames with BFU and BFV prefixes that shipped in November and December of 1990, respectively.
Nice revolver, BTW. I’m a big fan of the -7 variant of the Model 60.