Cachet depicts Alfred Nobel, while stamps depict the 1901 Nobel Prize winners.

1961 postage stamp from Suriname featuring an illustration of coconuts (Cocos nucifera). In Suriname, every part of the coconut is used in home remedies and holistic medicine. Tea is made from coconut husks to treat…

Romanian postage stamp issued in 1960 featuring an illustration of a nuclear reactor.

1960 postage stamp from the German Democratic Republic (East Germany) featuring an illustration of Rosa canina, commonly known as the Dog Rose or Rose Hip. Rose hips have high levels of Vitamin C, antioxidants, and…

1960 postage stamps from Rio Muni (Republic of Equatorial Guinea) featuring a Croton plant (Croton tiglium). These stamps are part of a series for the "Pro-Infancia" (For Childhood) fund.

1959 postage stamp from Rio Muni (Republic of Equatorial Guinea) featuring a castor oil plant. This stamp is part of a series for the "Pro-Infancia" (For Childhood) fund.

Soviet Union postage stamp commemorating the First Congress of the International Federation of Automatic Control (IFAC), which first took place in Moscow, Russia. The stamp features the Tower of the University of Moscow…

Cachet and stamp depict Johan Gadolin, who discovered the element yttrium and is considered the "founder of Finnish chemistry." The stamp commemorates the bicentennial of Gadolin's birth and features his likeness based…

1950's Belgian stamp featuring Snow gentian (Gentiana nivalis). This stamp was issued in a series to fund the anti-tuberculosis movement, indicated by the Red Cross (specifically the Lorraine cross) in the top left…

1957 postage stamp from Yugoslavia, depicting the Scopolia carniolica plant. Scopolia carniolica is a highly toxic plant containing potent tropane alkaloids, primarily scopolamine and hyoscyamine. The plant is the…

Postage stamp from the German Democratic Republic (East Germany), commemorating the 250th anniversary of the German Academy of Sciences in Berlin. The stamp features a portrait of Hermann von Helmholtz (1821-1894), a…

Cachet and stamp depict the Swedish chemist and physicist Svante Arrhenius.

1959 postage stamp from Spanish Guinea (Republic of Equatorial Guinea) featuring a castor oil plant. This stamp is part of a series for the "Pro-Infancia" (For Childhood) fund.

1959 postage stamp from Spanish Guinea (Republic of Equatorial Guinea) featuring a castor oil plant. This stamp is part of a series for the "Pro-Infancia" (For Childhood) fund.

Depicts three 19th-century silver miners.

1959 postage stamp from Yugoslavia featuring an illustration of alder buckthorn (Rhamnus frangula). Its bark has a variety of uses. As early as the 2nd century AD, buckthorn was believed to protect against witchcraft,…

Stamp depicts measuring instruments.

Cachet and stamp depict oil pipeline and drilling derricks.

First day cover commemorating the 175th anniversary of École des Mines de Paris (National Superior School of Mines), also known as Mines Paris.

1958 stamp from Mozambique, which was a Portuguese overseas province from 1951 to 1972. The stamp features a botanical illustration of Strophanthus grandiflorus (Sand Forest Poison Rope), a medicinal plant known for its…

1958 stamp from Macau, which was a Portuguese overseas province in West Africa from 1588 until 1974. The stamp features a botanical illustration of Maytenus senegalensis. Maytenus senegalensis, also known as spike…

Six East German postage stamps commemorating physicist and Nobel Prize Winner Max Planck (1858-1947). The red and green stamps are to celebrate the birth of Planck. The purple stamp is part of a series honoring…

1958 postage stamp from São Tomé and Príncipe featuring an illustration of a Senna plant. Senna plants are native to Djibouti and have been used as natural laxatives.

Postcard depicting the Atomium monument from the 1958 World's Fair exhibition in Brussels, Belgium. Designed by engineer André Waterkeyn (1917-2005) and architects André (1914-1988) and Jean Polak (1920-2012), the…

1958 postage stamp commemorating the 6th International Congresses on Tropical Medicine and Malaria. The postage stamp features an illustration of an Aloe Vera plant, which has been used in both traditional and modern…