The question on the buckle HJ

[zeppelin]

Unfortunately no, buckle sold on one of the Internet resources.
I'm very alarmed writing this stigma.
Thank You Chad.

[David North]

Do not forget chaps that the pinned thread relating to...

RZM and number usually correlate with the M1 codes
KH (Koppelschloss Hersteller) usually correlates with M4 codes
UE (Uniformen Effekten) usually correlates with M5 codes

... is only a crude "rule of thumb" as "usually" and it is neither absolute or definitive.

Regards,

David

[zeppelin]

I think this buckle may possibly be a Cramer and Dornbach (KH45) buckle with a very worn marking.
Can you please post an enlarged closeup of the marking?
thanks
Chad

Mr. Chad, kindly provided this photo. Thank you.

[Erno]

I think Chad is correct.