firstly, i was under the assumption that the guitar and bass TRCs of this era were identical in size - is this correct?
the first came from a 450 guitar (the lower TRC in photo 1), the second was supposedly found in an old box of parts (the top TRC in photo 1).
my Luthier is concernced that the one that just arrived (top TRC) may not be authentic as it has rougher edges and lettering, while also being much larger than the other (lower TRC).
photo 1 (comparison):

photo 2 (close-up of lettering on a 60's guitar TRC):

photo 3 (close-up of lettering on the TRC in question):

photo 4 (TRC in question sitting on RM headstock):

opinions much appreciated!

