As a review, of the product Vintage Gun Grips
I have put them on four models , first was pair of OMV the fit was fine... next came a pair of Uberti's, fit was also very good...
this was all 10 -14 years ago.
Lately, I put a set of them on a Uberti #3 , I say put there was no fitting really required, though I did have to relocate the
hole for the frame pin... beyond that they were a spot on fit.
The circa 1901 , 38 New departure has original grips.