Here is the latest Märklin pre-war Güterwagen purchase to arrive from Germany - a very nice 4achsig 1853/0 Tarpaulin wagon.
Not sure if the tarpaulin is original as I would have expected it to have MÄRKLIN printed on the side. So possibly a reproduction but an old, stained one.
I certainly didn't expect it to arrive in a box which I'm sure must be reproduction given what looks like photocopied artwork glued to the box plus the catalogue number is incorrect and copied off the 18520 wagon which was used as a base unit for this variant.