1936 6c on 2c violet, also handstamped "Air Mail" on 1c with red Official Service overprint, "six cents" omitted (pulled perf. and small tear at right), used on flown FDC from Monrovia to Harper, some cover toning, otherwise fine and rare, signed Calves (Cat No. C1,3var) (Image)

Est.$500

1936 6c on 2c violet, also 6c on 3c bister, blocks of four, stamps with glassine backing as usual, fine-v.f., rare multiples, signed Roger Calves, cat. $2000 (Cat No. C1-2) (Image)

Cat. $2000, Est.$750