Interesting! Perhaps no opportunity for more, better-detailed photos? I've edited and better lightened, but didn't help much. Below. Your narrative reference "additional nomenclature", but no reference to what such is! Hope whatever further under-barrel nomenclature, helps. Just now, simply a very generic presumed Mauser 98, narrowing possibilities to... perhaps 50 million +/-!
Information concerning scope mounts sometimes helps peg 'era'. Just now, your hands-on estimation likely far superior to any other WAGs!
Best & Keep Safe!
John
