Lot 51361 – 1921-23 5m. olive-brown and black with “SPECIMEN” (D16) in double pane of 120

1921-23 5m olive-brown and black with “SPECIMEN” (D16) in double pane of 120 from the top of the sheet with pillar margins at foot, showing a few minor type varieties, a few faults in places though an exceptional multiple, being the only known large multiple with stamps thus overprinted.