"a circlet of white metal"
The first horseman as depicted in the Bamberg Apocalypse (1000-1020)
Public DomainThe first horseman as depicted in the Bamberg Apocalypse (1000-1020) - Credit: Otto III. oder Heinrich II

In Revelation, the first Horseman rides a white horse and carries a crown. He was thought to be the Antichrist, or in some cases Christ.

In time, this first Horseman 'Conquest', was replaced by Pestilence. However, in Good Omens, Pollution has taken over ‘when Pestilence, muttering about penicillin, had retired in 1936”.