b'102ex 788788P PROOFS: 1981 (SG.421-25) Land Snail Shells: complete set of Courvoisiers original colour separations and completed designs (without denominations), all IMPERFORATE and affixed to the official Archival pages [#1831 & 1832] in the following denominations: 7t (issued as 15t), 20t as issued, 30t (issued as 5t), 45t (issued as 30t) and 50t (issued as 40t). A superb and Unique complete set. (28 items)$1,0001,500'