Hi there, not really my area of expertise, however there should be someone along shortly who can assist.
It is a original Prussian buckle. I have had a couple with the same box with the circle on the back. The prongs have had the tips cut short for some reason. I have never seen a tab attached like this but it was probable added during the period. Here is a example that is probably from the same manufacture .
Hello,
A beautiful original.
The bulge on the back serves to reinforce the medallion and protect it from denting.
The tab is originally riveted and known as such..
Regards
The kabl
As stated original buckle, riveted tab for me is a repair or an add on
Ben
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