Germany, Kriegsmarine. A Destroyer War Badge, by B.H. Mayer certificate_of_authenticity but couldn't find the source

but couldn't find the source

from March 25 to April 23

7th-11th Hussars (in bronze gilt

circumscribed by an inscription of “15

Germany, Kriegsmarine. A Destroyer War Badge, by B.H. Mayer certificate_of_authenticity but couldn't find the source(Zerstrerkriegsabzeichen). Constructed of gilded and silvered tombak, the obverse consisting of an oval oak leaf wreath, joined together at the bottom by ribbon, topped by a Heer style German national eagle clutching a mobile swastika, surrounding a central depiction of a destroyer cutting through waves, with its bow extending beyond the edge of the wreath, the reverse topped by a stabilizer, with a block hinge and narrow banjo style pinback meeting a