b'100ex 786786P PROOFS: 1978 (SG.350-53) Sea Slugs: complete set of Courvoisiers original colour separations and completed designs, all IMPERFORATE and affixed to the official Archival page [#1685/1] in the following denominations: 7t (issued as 10t), 10t (issued as 15t), 30t (issued as 35t) and 40t as issued. A superb and Unique complete set. (24 items). $1,0001,500'