Hi Alex,
It is "ehrenpreis-like"....what it is is unknown. The dueling eagles are of the smaller variety (smaller than the ones found on the ehrenpreis. They are, IMO, the same size as the "dueling eagles" that Weitze sold a few years ago (not sure if you recall those - it was just a set of the smaller eagles)).
Attached is a picture of the plaque.
Gary B