I never looked closely enough at mine to compare, but posters here have said the London gripframe is the same as the Colt, or Uberti's own SAA, and the brass frames are a bit smaller. We are talking profile here, not screw patterns. An Uberti London gripframe should fit any Uberti for screw location, but a new part from VTI or such would probably need fitting at the edges, sides,etc. as they will probably (hopefully) be oversize.