98k Mauser ID help

[Sarge]

You say it is an RC, but I don't see an X on the rec or bbl. Are there importer marks on the left or bottom muzzle end of the bbl? I see a mark on the stock that makes me think this is a jugoslav, Bulgarian or Romanian rework, can't remember which.
You say the stock matches the rec - where is that ser nr as you don't show it.
You don't show right side of the rec so I can only make out 1 WaA which matches the bbl date of 41. The gg has nothing to do with the year, but says that the rifle was assembled in late 41. No the 0 under the banner is not the year of mfg, I have no idea what that represents, never see the likes before.
It looks like a left over or rejekt Standard Model rec was dug out and assembled in 41.
Sarge