Colorano cachet includes a silk depiction of two alchemists in a laboratory. Stamp depicts chemical glassware and fluids.
Cachet created by ArtCraft includes depictions of an Atomic Research Center. Stamp depicts a mushroom cloud from a nuclear explosion crossed out with an "x".
- Creator ArtCraft
- Subject Treaty on the Non-proliferation of Nuclear Weapons (1968 June 12), Treaties, Science on postage stamps, Commemorative postage stamps, First day covers (Philately), Postage stamps, Nuclear nonproliferation, Nuclear energy--Research--Laboratories, United Nations, Cachets (Philately), and Postmarks
First Day Cover commemorating United Nations efforts for the cessation of nuclear testing and preservation of humanity
Cachet and stamp depict a mushroom cloud from a nuclear weapons test. Cachet was created by Fleetwood and the stamp was commissioned by the United Nations Postal Administration. Postmark depicts the United Nations…
First Day Cover and Polish postage stamps commemorating the 100th anniversary of the birth of Marie Curie
- circa 1967
Cachet and purple stamp depict a statue of Marie Curie, while the red stamp depicts Curie herself.
- Subject Chemists, Science on postage stamps, Women in science, Commemorative postage stamps, Physicists, First day covers (Philately), Postage stamps, Nobel Prize winners, Women chemists, Women scientists, Women physicists, Women in chemistry, Cachets (Philately), Curie, Marie, 1867-1934, Postmarks, Women in physics, and Poland