Bidspirit auction | Soviet Union - Die Proofs

Soviet Union - Die Proofs Selection - 1977, Mail Processing, complete set of five die proofs of 4k in various colors, artist G. Komlev with group of engravers, size 118-120x76-86mm, printer's markings at sides, produced on wove paper without gum, mostly VF and very rare in complete set, Est. $1,500-$2,000, Sc. # 4619-23