Coat of arms of Mengden

The blazon

D'arg. à deux fasces de sa. C: un vol, d'arg. et de sa.; ou, deux pi. d'aut., d'arg. et de sa

Source: J.-B. Rietstap, Armorial Général (1884)

A blazon is the description of a coat of arms in the technical language of heraldry. The drawing comes from that text, and from nothing else.