Rustre, or Mascle round-pierced: a lozenge with a circular perforation. Certain ancient armour composed of links of this shape sewed upon cloth is thought to have supplied the origin of the charge. It is, however, very rarely found.
Or, a rustre sable--CUSTANCE.
Or, three rustres sable--PERY, Ireland.
Argent, a fesse between three rustres sable--PARRY, Ireland.