Front sight band marked "A"
I recently bought a RIA M1903 with a RIA 4-06 barrel date, serial number 32238, high wood, no cross bolt bolt stock with CN 1908 cartouche; handguard without sighting groove or clips; smooth trigger and butt plate, serifs on the cut-off and safety lettering, etc. I think all the parts are correct for the 1908 period when it was assembled, but, there is an A on the underside of the front sight band. What is your opinion as to whether this sight was assembled with the rifle or is a later replacement?