TONGA SG 47 1922 6d chocolate Coral IMPERF printer sample Pair Type DS1

1922 (c.) 6d chocolate Coral (Type 20 design) imperforate printers sample on thick surfaced wove opt SPECIMEN (type DS1) a fine horizontal pair affixed to piece of brown card from a sample book. Rare in a multiple. Original Purchased from Stanley Gibbons (Still on their card)