1929 Lithograph essays for unadopted joint Spanish-American issue, ten examples engraved by C. Burt and printed by the American Bank Note Company in black or sepia, ranging in size from 5x7cm to 13x10cm on card, mostly allegorical images except for one depicting Columbus sighting land, a couple affected by tone spots, a unique and attractive group of proofs Estimate: € 3’000 – € 5’000 (Image)

1961 25th Anniversary of the National Uprising unadopted issue plate block used to print the proofs, with serial number “1269”, also including four such proofs in brown, black, bright blue and red Estimate: € 5’000 – € 6’000 (Image)

1976 2p Mount Guajara (Teneriffe) essay group including: – The original view postcard the design is based on – 12x10cm ink essay of the view – Four photographic essays taken fro the ink essay in stamp-size format (2 normal and 2 mirror imaged) – 6x5cm handpainted essay of stamp design incorporating the view – Corner marginal block of six of the issued stamp Estimate: € 4’000 – € 5’000 (Image)