Nice IC example! Great photo spread!
I love the rack number 34
Neither of my ICs have intact rack numbers, just a few flecks of paint in the right location on one.
The two lines of the import mark on opposite sides of the barrel are interesting. Apparently the
company, address line, and
model, chambering line were separate stamps.
I have never seen a counter-bored SKS, so I agree that is unusual too.
I wonder if it had a blued bolt carrier that some uninformed previous owner treated with an acid soak and polishing wheel