“Electrum was used as early as the third millennium BC in Old Kingdom of Egypt, sometimes as an exterior coating to the pyramidions atop ancient Egyptian pyramids and obelisks." [anon]
Alchemical table bell of Emperor Rudolf II.
Around 1600, the Prague goldsmith Hans de Bull cast two bells for Emperor Rudolf II (1552–1612). One of them has survived the last four centuries and is currently on display at the Kunsthistorisches Museum (KHM) in Vienna. The bell was cast from an alloy of the seven planetary metals - gold, silver, copper, iron, lead, tin and mercury - before being gilded.
This was confirmed by a recent XRF study. Such a seven-component alloy was described by the Swiss physician and alchemist Paracelsus (1493/4–1541), who named it Electrum and provided astrological and alchemical instructions for creating effective artifacts from it in his text corpus Archidoxismagica (Huser, 1590, Appendix, pp. 115– 130) https://www.khm.at/objektdb/detail/91976/