Please check this unmarked buckle for authenticity

[Retsiger]

This last buckle I have is odd. There is a very faint RZM in slightly raised lettering. It is difficult to see in the image, but there are scratches which almost onscure the mark. I don't know my metals very well, but it looks like a subtle bronze.

[Wewelsburg]

Looks like a very nice and early Berg & Nolte. I think the marks is RZM 30.
Their marks were often very faint. I have a cool DJ buckle to compare with:
DJ M4/30 Berg & Nolte


Here is a great buckle to compare with also, marked with RZM K.H 30
HJ - KH 30 w/Belt

Dont give up on this hobby dear Dixie, you have great buckles I would like to have the buckle you just posted!

[Gunny Hartmann]

Looks legit!...

[Wewelsburg]

Another cool buckle to compare marks with.. pics borrowed from kirby
By the way, I think your HJ buckle are nickel plated brass.

[Gwar]

I recently acquired a buckle similar to yours... At least It looks like it in a general manner... Concerning the "Hook"
I sold it to a fellow forum member.. RZM 17 Assman & Sohn... G

[Retsiger]

Thank you for commenting. I am fascinated by these buckles and have no idea why. This is turning out to be a good day!

[Ben Evans]

Very nice and I agree with the rest, Berge and Nolte buckle, look at the catch