Where or which specific watches have promethium?

Answer 1

Promethium is a rare radioactive element that has been used in some luminous watch dials, particularly in the mid-20th century. While specific models are not commonly documented due to the rarity of promethium use, it was notably used in certain military and scientific watches during the 1950s and 1960s. Brands like Hamilton and some military-issued watches may have incorporated promethium for its luminescent properties. However, due to safety concerns and regulations, its use in consumer products, including watches, has largely been discontinued.