The only two M1899 SRC’s that I’ve seen were fakes.
There was a post (believe it was Loggah’s) in this forum awhile back indicating that a gun in question that was at the Allentown Show was out of the S/N range when SRC’s were produced.
Out of serial number range and ring staple was in wrong place. You and I both looked at the gun. I'm sure you remember. I think it was a 1927 serial number if I remember correctly. Loggah picked it off, no problem...
Edit: And Joe was there too, thanks for reminding me Joe. Man, the years and guns and people run together as I get older