1949 Solidarity Issue, imperf. preliminary die proof of the souvenir sheet, printed in the approximate colors in which the stamps were to be issued, on thick card, with serial number and dated at bottom, pencil lines drawn to indicate the size of the sheetlets, with die cuts and one-line text, v.f. (Cat No. CB31-34P) (Image)

Est.US$250

1948-50 Solidarity, Semi-Postals and Air Post, four different imperforate collective deluxe souvenir sheets, also eight different imperforate and gummed trial color proofs of same, different combinations of colors, n.h., v.f. A rare group (Image)

Est.US$1,000