b'52ex 317 ex 318317P Flowers & Plants - Proofs: Algeria 1982Medicinal Plants, Courvoisiers original colour separations and completed designs, all imperforate and affixed to the official Archival album page [#1890], dated 1982. Beautiful and unique. (24 items). $400600318P Flowers & Plants - Proofs: El Salvador 1960 Christmas (Flowers) complete set of imperforate colour separations for the eight standard denominations plus the 40c & 60c that were only issued in miniature sheet format, affixed to eight pages from the printers records. Ex Courvoisier Archives. (119 proofs)$1,0001,500ex 319 ex 320319P Religion - Proofs: Colombia 1952 Cathedral of Manizales Courvoisier imperforate colour separations for 23c& 30c denominations in various shades, all affixed to the official Archival album pages [#102, 118 & 119]dated 11/7/1951 & 26/3/1952. (30 proofs) $400600320P Religion - Proofs: Colombia 1954 St. Francis of Assisi, Courvoisiers original photo essay, colour separations, trial printings & completed designs, all imperforate on official Archival album pages [#78 & 79] dated 4/10/1950 & 17/11/1950 showing the as A. Rosselet. The almost complete designs show small varieties in lettering from the issued stamp & illustrate experimentation in the ink colours used. A wonderful insight into the development of this stamp which was issued 4 years after the designs were submitted. Unique.(29 items) $600800'