Coat of arms of Pinney

The blazon

gu. three cross crosslets fitchee ar. issuant from as many crescents or. — Crest, an arm, embowed, in armour, ppr. from the shoulder to the elbow placed on the wreath, the other part erect, holding a cross crosslet as in the arms.

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.