- January 17, 2026Base metal used extensively in coinage as a substitute for silver, frequently alloyed with copper to make cupro-nickel.
- January 17, 2026Coins that, though technically valid for use, do not circulate in practice (such as silver and gold commemoratives). Abbreviated to…
- January 17, 2026(from Latin numisma, coin) The study and collection of paper money, coins and medals.














