586 Chemistry / Chimie Other proofs
Lot No |
Type |
Description |
Price |
6790 |
EP |
BELGIUM (1948) Chemical industry. Black Ministerial Proof with embossed seal. Scott No 374. Yvert No 761.
|
AVAILABLE AT $50 |
6791 |
EP |
BELGIUM (1948) Chemical industry. Black Ministerial Proof with embossed seal. Scott No 375. Yvert No 762.
|
AVAILABLE AT $50 |
6793 |
EP |
BELGIUM (1955) Ernest Solvay. Ministerial proof. Scott No B573, Yvert No 973. Improved the process for making soda ash.
|
AVAILABLE AT $60 |
6794 |
EP |
BELGIUM (1955) Jean-Jacques Dony. Ministerial proof. Scott No B574, Yvert No 974. Developed a process to purify zinc ores.
|
AVAILABLE AT $60 |
15885 |
EP |
GERMANY (1964) Benzene ring*. Photo essay (See Note) (unaccepted) for centenary of discovery of benzene ring by Kekulé. Measures 90 x 120 mm. Scott No 892, Yvert No 310.
|
AVAILABLE AT $75 |
15887 |
EP |
AUSTRIA (1995) Josef Loschmidt*. Black proof. Loschmidt first determined the diameter of a molecule using the kinetic theory of gases. Scott No 1682, Yvert No 1992.
|
AVAILABLE AT $20 |
24673 |
EP |
AUSTRIA (1973) Fritz Pregl*. Black print. Scott No 978, Yvert No 1265. Won Nobel Prize for improving known methods of quantitative organic microanalysis.
|
AVAILABLE AT $20 |
24674 |
EP |
AUSTRIA (1979) Richard Zsigmondy*. Black print. Scott No 1133, Yvert No 1448. Nobel Prize for colloidal chemistry discoveries.
|
AVAILABLE AT $20 |
24675 |
EP |
AUSTRIA (1989) Friedrich Emich*. Black print. Founder of modern microchemistry. Scott No 1489, Yvert No 1810.
|
AVAILABLE AT $20 |