6 Attachment(s)
Early Rock Island 1903 rifles
Some years ago, I also found a early Rock Island, not as early as your sn 8485, but from around early 1907. My serial number is 64145 and barrel is RIA 3-07. Rear sight is also open bottom but never relocated. My rear sight leaf is without the rib on top and the slide is square on the left side which is a very early variation. My stock also has the single bolt and cartouche is very faint too. Handguard also has the groove like yours but without the clips.
I would say you have a very early Rock Island and quite rare with that barrel.Attachment 97006Attachment 97007Attachment 97008Attachment 97009Attachment 97010Attachment 97011