What is a KM number on a coin?
A KM number (Krause-Mishler) is the standard catalogue reference for most modern world coins. Listings look like KM# 123. It is not minted on the coin. It names the type in the Standard Catalog of World Coins so collectors can point at the same issue.
KM vs other numbering
Specialist series use other codes (for example Y# in some older listings, or national numbers). For mixed world coins, KM is the common shorthand — the coin equivalent of a Pick number on paper money.
How to find a KM number
- Read country, denomination, and date from the coin (both faces if needed).
- Note mint marks, edge, and metal if you can tell them apart.
- Match the type in a world-coin catalogue or a listing that cites KM.
- If legends are in a script you cannot type, photograph both faces and crop to the rim. See how to identify a coin from a photo.
Useful tips
- Date and mint mark often change the KM line or a variety note — photograph the side that holds them.
- Worn dates still allow a type match if the main device is clear; the exact year may stay unknown.
- Tokens, medals, and fantasy pieces often have no KM number.
Common mistakes
- Expecting KM to be engraved on the coin.
- Using KM as a price. It identifies the type; value still follows grade, rarity, and metal.
- Photographing several coins in one frame.
How Banknote & Coin ID helps
In coin mode, a confident match can include a KM reference with country, denomination, and year. Low-confidence photos should not invent a catalogue number. The same app returns Pick numbers for notes. See the coin identifier app overview.
Find a KM number from a photo
Download Banknote & Coin ID on Android. Three free scans to try.
Related guides
FAQ
Is KM printed on the coin?
No. It is a catalogue number assigned in reference books and listings.
Does every coin have a KM number?
Most modern circulating world coins in the standard catalogue do. Tokens, medals, and some ancient or highly specialised series use other systems — or none.