Specimen SPECIMEN TYPE HK4: 16c. on 18c. and 28c. on 30c. handstamped "SPECIMEN" type HK4, without gum, fine and scarce. Photo

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Specimen SPECIMEN TYPE HK4: 16c. on 18c. and 28c. on 30c. handstamped "SPECIMEN" type HK4, without gum, fine and scarce. Photo