This works: Post Photos to NE

Glad to hear of the bolt progress. Sounds like another fine old MS has found a good home.

BTW; the " circle G (?), Circle T ("Tiegelgussstahl"), and the "0" on barrel and receiver." marks may be as follows; 'circle G' is, I think, an inspector's mark from Steyr. I believe you're right about the 'circle I', and the zero on barrel and on receiver may be indications of chamber depth / headspace. My M1910 is marked '+15, -15'. Members Kuduae and Lancaster know these details better than I.