AUSTRIA (1967) Vienna*. Black print. Scott No 794, Yvert No 1075. 10th Europa talks "Science & Society in Europe."
AVAILABLE AT $20
AUSTRIA (1981) Johann Florian Heller*. Black print. Scott No 1183, Yvert No 1505. Pioneer of urinalysis. 11th International Clinical Chemistry Congress.
AVAILABLE AT $20
AUSTRIA (1983a) Karl von Terzaghi*. Black print. Scott No 1255, Yvert No 1582. Founder of Scientific Subterranean engineering and the father of soil mechanics.
AVAILABLE AT $20
GERMANY (1966) Werner Siemens*. Photo essay (See Note) of unaccepted design for 150th anniversary of birth of inventor and industrialist, founder of Siemens. Scott No 967, Yvert No 385.
AVAILABLE AT $60
GERMANY (1966) Oscilloscope screen*. Photo essay (See Note) of unaccepted design for 150th anniversary of birth of inventor and industrialist, founder of Siemens. Scott No 967, Yvert No 385.
AVAILABLE AT $60
BELGIUM (1987) Robotic hand. Ministerial proof signed by the designer. Scott No 1263, Yvert No 2243. Flanders Technology International.
AVAILABLE AT $50
BELGIUM (1988) Lyre. Quill pen. Book. Atomic symbols. Ministerial proof. Scott No 1296, Yvert No 2297. Royal Academy of Science, Literature and Fine Arts.
AVAILABLE AT $50
(Image b)
AVAILABLE AT $450
AUSTRIA (1992) Paul Kitaibel*. Black proof. Famous botanist. Scott No 1562, Yvert No 1885.
AVAILABLE AT $15
AUSTRIA (1999) Draftsman's tools*. Books*. Black proof. Austrian patent office. Scott No 1781.
AVAILABLE AT $15
AUSTRIA (2015) Joseph Hardtmuth*. Black print. First mass-produced cheap pencils.
AVAILABLE AT $15
AUSTRIA (1977) Nicholas Joseph von Jacquin*. Black proof. Botanist who first brought platinum and sugar cane to Austria and did seminal work on tropical fungi. Scott No 1051, Yvert No 1369.
AVAILABLE AT $20
AUSTRIA (1983c) Gregor Mendel*. Black proof. Scott No 1264, Yvert No 1592.
AVAILABLE AT $25
AUSTRIA (1985) Josef Stefan*. Black proof. Developed DC and Ac current techniques. Cofounded Viennese school of physics. Established standard orchestral pitch for "A". Developed formula for black body radiation with pupil Boltzmann. Scott No 1307, Yvert No 1636.
AVAILABLE AT $20
AUSTRIA (1985) Hanns Horbiger*. Black proof. Refrigeration engineer whose work lead to air conditioning. Also proposed wierd cosmological theory that the universe originated as an enormous glowing mass collided with a smaller mass of ice (Welteislehre). Scott No 1331, Yvert No 1661."
AVAILABLE AT $25
U.S.A. (1946) Smithsonian Institution*. Photo essay (See Note) of final design commemorating centenary of founding. Scott No 943, Yvert No 495. Rare!
AVAILABLE AT $60