Identifying coins · All coin guides

How to identify a coin from a photo

Most coins can be identified from two clear photos — the front (obverse) and the back (reverse). The trick is to read the clues in a fixed order and then confirm what you found in a catalogue, instead of trusting a first guess.

1. Take usable photos

Use soft light from one side, a plain background and the phone held parallel to the coin. Take one photo of each side and close-ups of the date and the mint mark area. The guide on photographing coins has more tips.

2. Read the clues in order

1. Country. Look for the country name in the legend (for example “United States of America”, “Canada”, “Helvetia” for Switzerland) or a national emblem.
2. Denomination. The face value is usually written out or shown as a number, often on the reverse.
3. Date. Usually on the obverse. Some countries use other calendars or eras; a catalogue will show you how to read them. See reading a coin’s date.
4. Mint mark. A small letter that shows where the coin was struck. On US coins its position depends on the series — see where the mint mark is on each US coin.
5. Design and size. The portrait, reverse design and diameter separate similar types.

3. Check a catalogue

Search the country and denomination in a catalogue such as Numista (world coins) or NGC Coin Explorer and PCGS CoinFacts (US and world). Compare the design, the date range and the metal. A match on all of them is much more reliable than a match on the picture alone.

4. Know what a photo cannot tell you

• Weight, exact metal and whether a coin is genuine usually need scales, a magnet test or an expert. See NGC’s counterfeit guidance in the sources.
• Small varieties (such as doubled dies) may need a magnifier and good references. See error coins and varieties.
• Condition affects value a lot and is hard to judge from one photo. See coin condition basics.

Using an app

Apps such as MintPriced read the photo and suggest country, denomination, year, mint mark and metal. AI can be wrong, so MintPriced asks for a close-up when the date or mint mark is unclear, and you confirm the year and mint mark yourself before saving. Treat any app result as a starting point and check it against a catalogue for anything that matters.

Sources and further reading

• U.S. Mint: Anatomy of a coin
• U.S. Mint: Mint marks
• Numista world coin catalogue
• NGC Coin Explorer
• PCGS CoinFacts
• NGC: Counterfeit detection

More answers in the coin FAQ.

General information, not financial or appraisal advice. Values depend on condition and the buyer; ask a qualified dealer or grading service before buying or selling.