1920 C.I.S. overprints, complete set, last three sheet margin singles, l.h. or h.r., few lower values, plus 1m and 2m n.h., fine-v.f., signed, also with 1999 APS certificates for the last seven values, scarce, cat. $2538 (Cat No. O1-14) (Image)

Cat. $2538, Est.US$750