WW2 German army buckle - original?

[AusA380]

Picked this up recently, but haven't seen any others like it. There isn't a metal loop on the back like other buckles I've seen. It's quite light and appears to be made from aluminium or something similar. No visible markings. Anyone seen this type before or is it a repro?

[Ben Evans]

Original private purchase buckle

[AusA380]

Thanks! I've found pics of ones that look the same. Apparently late war & made of zinc.

[Ben Evans]

They made them throughout the war, purchased for walking out, sometimes referred to as parade buckles

[Ben Evans]

Other variations

[AusA380]

Thanks everyone!