I haven't seen this rifle in person yet (next few days) but I'm looking for info on it, especially the scope. It's a Rock Island M1903 (don't have the serial number yet) with S.A.D.A.L. on it. Online, I found out that that stands for Springfield Armory Donald A Leary (inspector). I don't think it's been altered.
I've been reading about the low number receivers (under 300,000 for RIA I think).