(131) AUSTRIA 1973 : Sc# 956 JOSEF PETZVAL'S PHOTOGRAPHIC LENS MNH VF
(3006) AUSTRIA 1986 : Sc# 1359 MNH VF SONNBLICK OBSERVATORY CENT.
(9196) DDR 1968 : Sc# 1025 KARL LANDSTEINER BIOLOGIST PHYSICIAN IMMUNOLOGIST - MNH VF
(2315) DDR 1969 : Sc# 1112 WOMAN WITH MICROSCOPE INDUSTRY WOMEN'S CONGRESS - MNH VF
