What is the N# number visible in the catalogue?

Coins, banknotes and pieces of exonumia in the Numista catalogue are assigned a unique number, denoted as “N#”. This number uniquely identifies a type of coin, banknote or exonumia. It is visible on the pages of the Numista catalogue.


The N# number can be used each time you want to refer to about a specific item. Here are some examples where it may be useful to identify a coin, banknote or exonumia type:

  • on the holder of the coins in your collection,
  • on a sale listing,
  • in an numismatic article.


For example the number N# 1196 represents the French 10 Franc Montesquieu coin.

The N# contains only digits. Unlike some other reference numbers, it is not sequential and it doesn't convey any logical information; also, the N# numbers don't repeat for different countries or periods. The only purpose of the N# number is to have a permanent, immutable, and unique identifier.

Search by N# number

If you know the N# number of an item, you can quickly find it in the Numista catalogue using the search bar at the top of the website.

NN# numbers

In some contexts, Numista also lists the NN# number. The NN# number refers to a specific version of a coin, banknote or piece of exonumia. If a coin is minted with the same design and characteristics for several years, with different mintmarks and with different variants, the different year, mintmark and variant combinations share the same N# number but they each have their own NN# number.

For example, the US Columbian Exposition Half Dollar has the number N# 4396. The 1892 coin is identified with the number NN# 23112 and the 1893 coin is identified with NN# 23113.