Description:
Grover Master Plate for perforations. MP102/187 (1920) SR No. 677 for Leader Press. Stamp description: Letter/parcel regist. Size of Stamp: 1.68" x 1.0875"; No. of perforations: 29 x 10; Pins: 0.035; Pitch of perforations: .0579" x .0572" .