Description:
Grover Master Plate for perforations. MP102/13 (1920) SR No. 628 for Inland Revenue. Stamp description: P. O. S. B. Coupons. Size of Stamp: 1.825 x 1.2647; No. of perforations: 32 x 22; Pins: 0.035; Pitch of perforations: .057" x .0574 .