Item Title:
Grover Master Plate for perforations. MP102/255 (1927) SR No. 5139 for Institut de Gravure. Stamp description: Stamp. Size of Stamp: 23.904mm x 39.104mm; No. of perforations: 16 x 6; Pins: 0.035; Pitch of perforations: 1.434mm x 1.504mm .