The uploaded file shows two coats of arms that are supposed to be the same, however the one on the right looks more like the swans are holding keys on a ring instead of roses, which could make it the lost coat of arms of Henry von Schwan, Claviger in Güstrow in the 13th century.
Is there an "authority" on coats or arms who can give an educated opinion on this?
Best wishes,
Christiana Swan