FRANCE (1962) Denis Papin*. Pressure cooker*. Deluxe sheet. Scott No B359, Yvert No 1347.
AVAILABLE AT $15
BELGIUM (1986) Baron Michel Edmond de Sélys Longchamps. Ministerial proof. Scott No 1255, Yvert No 2226. Authority on dragonflies.
AVAILABLE AT $50
FRANCE (1970) De Broglie*. Ray-producing apparatus*. Deluxe sheet. Scott No B439, Yvert No 1627.
AVAILABLE AT $20
ETATS UNIS (1945) Bâtiment* de la Spencer Lens Compagnie. Empreinte violette de machine à affranchir sur pli Pitney Bowes No 92293: "Spencer pour l'optique de précision. Instruments scientifiques."
AVAILABLE AT $25
MONACO (2013) Jules Richard. Stage die proof in black signed by the engraver. Richard was an oceanographer who accompanied Albert I on many expeditions.
AVAILABLE AT $175
NORTH KOREA (1988) Australia Bicentennial - Satin bower*. Minisheet of 4 overprinted SPECIMEN. KSC No 2814.
AVAILABLE AT $30
F.S.A.T. (1977) Underwater sampling*. Deluxe sheet. Scott No 73, Yvert No 70.
AVAILABLE AT $20
GERMANY (1984) Ernst Ludwig Heim, botanist*. Specimen (overprinted MUSTER). Scott No 9N496, Yvert No 684.
AVAILABLE AT $15
FRENCH POLYNESIA (1986) Map of island*. Scientists*. Deluxe sheet, Stockholmia 86 souvenir sheet, showing Swedish scientists who accompanies Captain Cook on his voyage of discovery against background of nautical themes. Scott No C220, Yvert No BF12. Not easy to find!]"
AVAILABLE AT $25