I think you have other issues than the markings for a Colerain barrel. Does the barrel have radius grooves? What is the depth of the rifling? The condition of the sights with the front sight crooked in the dovetail and the chisel markings at the front sight indicate improper assembly and care of the rifle. These are significant warning flags. I would not consider buying a rifle with such glaring issues. What did the underlugs look like? I believe the OP is in the process of sending the rifle back and demanding a full refund.