This gun would have shipped in 1911 and it's serial number is found in the 20-gauge serial number block; so the gun was, and apparently still remains as it was bored. The pad appears to be a Hawkins, which would have been an available option on Smith guns; although I don't know if the Hawkins pad was available in 191i. I defer that detail to someone else; Researcher perhaps(?), but it looks too new not to be a replacement or an after-market addition. Stock pics are not good enough for me to make any sort of assessment as to originality. And yes David, I know the 4E in John's book has a concave rib, as the flat rib feature on Smith guns is rare before the introduction Hunter's single sighting plane rib in 1938; but I'm not going to get hung up on the rib. I'll reserve my opinion on that feature pending pics of the entire barrel and barrel flats.