SS/NSKK Black Belt Loop

[Carson]

I am trying to match a belt loop for my RZM marked hanger for my NSKK dagger. I have come across one that is in the same condition as mine, but there is no rivet above the D ring.

1) Is this a period belt loop?

2) Is the lack of rivet from early war manufacture, therefore matching my 1939 marked hanger?

Any info is appreciated so I can finalize my purchase. Thanks.