Description:
Grover Master Plate for perforations. MP102/422 (1938) SR No. 9746 for Bradbury Wilkinson & Co. Stamp description: Double comb "DA". Size of Stamp: 20.26mm x .9225"; No. of perforations: 12 x 14; Pins: 0.04; Pitch of perforations: 1.69mm x .0658924" .