GERMANY (1928) Hand* holding magnifying glass* over globe*. Letter with illustrated cachet for KOSMOS - 25 Years of Progress.
$10.0
GERMANY (1962) Archenhold Observatory*. Nice circular cancel on envelope showing Zeiss telescope.
$5.00
ROMANIA (1973) Bucharest Observatory. Airmail to letter with return address of Academie de la Republique Socialiste de Roumanie Observatoir Astronomique.
$3.00
LIBERIA (1974) Copernicus*. Set of 6 imperforates. Scott Nos 653-8, Yvert Nos 623-8.
$25.0
HUNGARY (1974) Segner*. Crater on Moon*. Segner wheel*. Imperforate. Scott No 2312.
$6.00
GERMANY (1975) Bochum observatory*. Illustrated cancel on postcard.
$4.00
GERMANY (1976) Telescope*. Transit*. Johan Palitzsch*. Postal card with cachet and special cancel. Palitzsch observed the return of Halley's comet as Halley had predicted.
$5.00
MALI (1980) Kepler*. Copernicus*. Set of 2 imperforate pairs. Scott Nos C388-9, Yvert Nos PA386-7.
$20.0
MALI (1980) Kepler*. Deluxe sheet. Scott No C388, Yvert No PA386.
$10.0
MALI (1980) Neptune* et orbite de Pluton*. Yvert No PA388. Scott No C390. 50ème anniversaire de la découverte de Pluton. Pair non dentelé.
$10.0
DJIBOUTI (1984) Galileo's telescope*. Set of 2 imperforates. Scott Nos C207-8, Yvert Nos PA213-4.
$10.0
NIGER (1985) Halley's comet*. Set of 5 imperforates. Scott Nos C361-5, Yvert Nos PA343-7.
$25.0
IVORY COAST (1986) Halley's comet*. Set of 5 imperforates. Scott Nos C99-103, Yvert Nos PA103-7.
$20.0
$40.0
$40.0