Laos, Proof & Specimen Group, includes three different 1957, 3k-16k Rice Workers (37P-39P) artist signed die proofs in green, two 1951, 1.50pi King Sisvang Vong (11P) artist signed proofs in dark violet and sepia, and Specimen overprint on Scott C6 & C12; scarce items. Estimate  $300 - 400. $0