Looks okay to me
Jbombs, I can't make out the letter suffix under the serial number.
My 'duv 41' 'n' block does not have the machined step on the receiver that yours does. It is a trait normally thought of on 1942 rifles, so I am assuming that it is a very late 1941 production.That step is from production, not 'butchered'.
I also notice a lack of serial number on the barrel near the receiver, but I do notice the marking on the barrel step immediately in front of the receiver on the left side. Curious about that. If it is marked '02' , it would indicate an arsenal rebarrel. Proofs on the barrel might identify the contractor.
The photos are too grainy for me to make a call on the stock. If it is the original stock, it would be numbered in the barrel channel. A better photo might also show what parts on the gun still have matching numbers - bolt and bolt parts, rear sight, and magazine components.
I am sure by now you have gotten personal messages offering to buy it. Best way to sell would be an auction with good clear photos of every major part available. Let the market decide if it is a '$150 deer rifle' . I'll bet it goes for more than that if the bolt and magazine are matching.
Good luck with a nice momento from your Grandfather that would certainly be worth keeping.
JT