Ron,
Thanks for the pics. I agree with what you said.
The numbers should be smaller, and the R should have a curved leg.
The 3 in the picture you posted seems to be similar, with the straight top, but the kink in the middle is more severe on yours. Your R's also seem to differ very slightly on the two different pistols (length of curved leg that sticks out at the end), but they at least look like Imperial R's.
Anyone that wants a high resolution (much larger shot) of the two that I provided can e-mail me if they think they need to see more in determining originality or fine details.
chad_quandt@hotmail.com
At least they put periods after each letter...something kind of Imperial-ish.