Rare German WW2 rubber belt 1941

Rare prototype of a German rubber belt
manufactured by KURTSEIDEL in Berlin only in 1941
very beautiful definitive piece in the collection
note a hole whose purpose remains to be clearly defined and part of the stitching of the leather tongue has broken, and been glued back on by the previous owner.
This is not a makeshift end-of-war model, but the unique prototype from 1941.