SPERATI, Jean de; La Technique Complete de la Philatelie d'Art, manuscript (original typed copy!) in french language, signed, with a few illustrations, 122 pages, hardcover with title imprint. A rarity about which Richard Frajola said; “A true rarity of philatelkic literature with fewer than five copies extant of the ten or so produced” (website, July 2020). Estimate: 200 Euro
