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1948, Wilhelmina 80 c. red, imperforated proof in double-sheet of 200 stamps with 10 gutter pairs, ungummed, some marginal faults. Very rare.

1941/50 (ca.), stock of about 2000 imperforated ungummed proofs, mostly in multiples

1865-67, City Post of Constantinopel : Liannos Collection on five album pages starting proof pair 5 pa. black on dull rose imperforated with guide line for printing on top, perforation varieties, imperforated blocks, colour shades, blocks of four, fine and unusual.