This fabric was removed from the underside of the center wing of a Voisin 10 Ca2, a French bomber, specifically N° 4.  It measures 19-3/4 in. x 12-1/4 in. or 50 cm x 31 cm.  It is painted black because the aircraft was used at night.  The reverse of the fabric is shown as well as an enlarged area showing what may have been a stamp applied by the manufacturer of the fabric.  According to 'Memorial Flight,' which restored the aircraft, this specific Voisin 10 belonged to Escadrille V110 and, while initially a bomber, was converted to a canon-carrying version.