Wikimedi'Òc

1986 CPA 5779.jpg - Mariluna

4microscopes4.jpg - File Upload Bot (Magnus Manske)

Stamps of Germany (BRD) 1968, MiNr 548.jpg - Nightflyer

Stamps of Germany (Berlin) 1981, MiNr 643.jpg - Nightflyer

1981. XXVI съезд КПСС.jpg - Butko

DBPB 1960 191 Robert Koch.jpg - NobbiP

DBPB 1971 416 100 Jahre Materialprüfung.jpg - NobbiP

Stamp of Ukraine ua119st.jpg - Butko

Stamps of Germany (DDR) 1964, MiNr 1061 A.jpg - Nightflyer

Saar 1949 264 Universität Saarland.jpg - NobbiP

Stamps of Germany (DDR) 1989, MiNr 3252.jpg - Nightflyer

Stamps of Germany (DDR) 1971, MiNr 1715.jpg - Nightflyer

Stamp of USSR 1006.jpg - Butko

Stamp of USSR 1007.jpg - Butko

Stamp of USSR 1640g.jpg - Butko

Soviet stamp 1968 50 let oktjabr kulturnoj revoluzii 4k.JPG - Bin im Garten

Stamp Soviet Union 1948 1252.jpg - Сдобников Андрей

The Soviet Union 1955 CPA 1382 I stamp (The eighth issue of definitive stamps. Scientist).jpg - Сдобников Андрей

Stamps of Germany (DDR) 1965, MiNr 1132.jpg - Nightflyer

Stamps of Uzbekistan, 2010-50.jpg - Cekli829

The Soviet Union 1966 CPA 3306 stamp (Microbiology International Congress (24-30.07, Moscow). Emblem - Microscope and Moscow University. Bacteria and Viruses).jpg - Matsievsky

The Soviet Union 1966 CPA 3306 stamp (Microbiology International Congress (24-30.07, Moscow). Emblem - Microscope and Moscow University. Bacteria and Viruses).png - Cmdrjameson

Crusade Against Cancer 5c 1965 issue U.S. stamp.jpg - MrFrosty2

Stamp of Albania - 1959 - Colnect 340723 - Scientists with measuring Instrument and Microscope.jpeg - Gone Postal

Stamp of Albania - 1968 - Colnect 347616 - World Health Organization Emblem Hospital and microscope.jpeg - Gone Postal

Stamp of Albania - 1984 - Colnect 364168 - Student with Microscope Symbols for Sports and Education.jpeg - Gone Postal

Stamp of Albania - 1999 - Colnect 186300 - Bilal Golemi 1899-1955 Albanian veterinary physician.jpeg - Gone Postal

Stamp of Algeria - 1966 - Colnect 242502 - Building of the Seat.jpeg - Gone Postal

Stamp of Algeria - 1966 - Colnect 242503 - Building of the Seat.jpeg - Gone Postal

Stamp of Brazil - 1980 - Colnect 209752 - Campaign against Barber bug fever.jpeg - Gone Postal

Stamp of Brazil - 1983 - Colnect 261582 - Microscope and crab.jpeg - Gone Postal

Stamp of Finland - 1972 - Colnect 46645 - Blood Analysis Microscope and Experiment Glass.jpeg - Gone Postal

Stamp of Rwanda - 1965 - Colnect 308297 - “Faculté de Medicine”.jpeg - Gone Postal

Stamp of Congo, Republic (Brazzaville) - 1966 - Colnect 674795 - International Cancer Congress in Tokyo.jpeg - Gone Postal

Stamp of Gibraltar - 1968 - Colnect 258 - 1 - Doctor and WHO emblem.jpeg - Gone Postal