SG 1.827 Barrel & Receiver markings

[deldriver]

Is that an I-BR at the back (on top) of the barrel nearest the breech? If it is, it's one of the 5000 button rifle barrels Inland installed late in production. I have a 6.975xxx with one of those barrels. It has no date stamp of any kind, but does have an Inland proof "p" and the famous hieroglyphics on the barrel flat. I hope this helps.