Thank you, that's more like it, makes it easier to analyse what you have there.
Whoever you bought it from must not have the ultimate knowledge of Mosins and you made the right choice, absolutely. We have 3 1942 Ishevsk here between my son and myself, only differing in collector's grade and accurateness on our conditions.
I would recommend you go into the resources of this site and analyse all the stamp marks on your receiver and wood, to get a rounder picture of what you have.
If your rifle still has the original crown and NO counterboring, you have a gun that went all the way to the end of the war in Good hands or minimally used as "way behind the lines weapon"; the many check marks could indicate something like that. A bureaucracy thing as everywhere else, only the guns at the front did not get this kind of check-up.
You said the rifling is excellent, good for you, you might have a pre-war shooter. ......I cleaned and shot my 43 Tula Round about 100 times and my rifling is still getting cleaner....The cleaning conditions in the field for these rifles were simply bad....that is why we still get crud out of all of them, only after 5 shots, intentionally......copperfouling and powder residue in the fields. And these bores are chromed...... so a thorough cleaning should do it, but it does not. Our motto here in the family is: Keep on scrubbing, baby!!!

and dance with the music...
Now, without you drooling too much, the undeciphered MO might have a meaning at all.....I am emailing with 3 people in Europe about this "BOLD STAMPED MO " on some numbers of Mosins, probably stamped by more important people than the workers in the Ukrainian Preserving/

Mummifying Death Commando,
I will, of course , post any new info. Good night, my new lady rests in her mineral bath till tomorrow...keep on drooling!!!
