1 Sek 1142 Apj 1987

The coin features a small "D" mintmark (for Eskilstuna) and the mintmaster's initial. Approximately 21,543,317 coins were produced in 1987. This version was demonetized on June 30, 2017 , and is no longer valid for payment in Sweden. Are you checking this coin for its collector value or looking for details on a different year

Beyond heavy fines and jail time, you will lose your right to drive for years. 1 sek 1142 apj 1987

In the sprawling archives of scientific literature, a citation like “1 Sek 1142 APJ 1987” appears, at first glance, to be a dry, bureaucratic marker—a mere coordinate on the map of human knowledge. But for those who know where to look, this string of characters is a time capsule. It points to a pivotal moment in astrophysics, buried in volume 1142 of The Astrophysical Journal in 1987. That year, while the world watched the explosion of Supernova 1987A, a quieter revolution was underway: the confirmation that we live in a universe dominated not by stars or galaxies, but by something invisible, vast, and utterly mysterious—dark matter. The coin features a small "D" mintmark (for

In astronomy, objects are often named like: (Einstein satellite source), or 1ES 1142+ (Einstein Slew Survey). The "1" could indicate the first catalog from a survey. "SEK" does not correspond to any known telescope, survey, or observatory code (e.g., CFA, MMT, VLA). Are you checking this coin for its collector