Orange River Colony 1902 4d on 6d on 6d Ovpts Tunisian Archive

1902 4d on 6d on 6d blue (SG 136). F/M example handstamped "SPECIMEN" type TUN1 in black (by the Tunisian Post Office as the Receiving Authority applying the handstamp to their distribution from the UPU). Interesting piece proving distribution of these overprinted issues through the UPU. Scarce. See additional image below.