NR-40 question

[kotkinjs1]

Hello all,
Picked up a 1943 dated NR-40 for not too much I think. Would like to ask if I can be comfortable with its originality. The knife looks good to me but the scabbard looks too clean and from other photos I've seen I'm not sure about the rivet in the leather? The knife weighs 104 grams which I think is approximately correct for an original. Thanks in advance!

[RKKAFan]

The trench knife looks ok to me. Zlatoust made.