How to identify and date old banknotes
Design evolution, printing technology, and paper type all help date a banknote — use these clues before scanning.
Visual dating by design era
Central bank note design has passed through recognisable eras that make approximate dating possible even without printing dates. 19th-century notes typically feature dense geometric lathe-work borders (produced by geometric engraving machines), elaborate allegorical vignettes, and monochrome or two-colour printing on thick rag paper. The transition to more colourful, portrait-centred designs came through the mid-20th century as colour printing technology improved. Post-1980 issues added increasingly sophisticated security features: metallic inks, holographic foil patches, and colour-shifting numerals entered widespread use by the 1990s. Notes from the early 2000s onward often include large UV-reactive patterns invisible under ordinary light. These era markers narrow dating even when a specific series year is absent. NoteLens uses both the visual pattern and any legible text to identify and date the note.
US currency history and how it affects collecting
US banknote history is one of the richest areas for collectors precisely because so many different types were issued across a relatively short period. Large-size notes were produced until 1928, featuring elaborate designs far more ornate than the current small-size series. Within large-size notes, distinct types include United States Notes (red seal), Silver Certificates (blue seal redeemable in silver), National Bank Notes (issued by chartered banks with the bank's name printed on the face), Gold Certificates (yellow seal), Federal Reserve Notes (green seal), and Federal Reserve Bank Notes. Each type has its own rarity profile, with key dates in some series reaching significant premiums. The 1928 transition to small-size notes introduced the design format still used today, and within small-size there are again signature series, plate varieties, and star note distinctions that divide the collecting field into highly granular subcategories.
World note varieties worth knowing
Collecting world banknotes offers extraordinary breadth: more than 200 issuing authorities have produced notes across hundreds of design series. A few areas draw consistent interest from collectors worldwide. British colonial and Commonwealth notes — issued under dozens of different territorial authorities — represent an accessible area where many attractive notes can still be found at modest prices, with genuine rarities for specialist collectors. Chinese banknotes from the Republican era (1912–1949) cover an enormous range, from common provincial bank issues to rare central government notes that command strong premiums. Latin American and African notes from the hyperinflation periods of the 20th century are collected both as historical artefacts and as curiosities of monetary policy. Japanese occupational currency issued during World War II covers a wide geographic spread across the Pacific. NoteLens covers the major catalogued series in all of these areas.
FAQ
What is the PMG grading scale for banknotes?
PMG (Paper Money Guaranty) uses a 70-point scale adapted from coin grading: grades 1–12 cover heavily worn notes (Poor to Fine); 20–45 cover circulated notes with diminishing wear (Very Fine to Extremely Fine); 50–58 are About Uncirculated; and 60–70 are Uncirculated, with 64 being Choice, 65 Gem, and 66 and above commanding significant premiums. EPQ (Exceptional Paper Quality) and PPQ (Premium Paper Quality) designators indicate the note has not been altered or treated.
How do I know if a banknote is genuine or counterfeit?
For modern notes, check the security features: genuine notes feel different from paper due to intaglio printing's raised ink, security threads glow under UV light in specific colours, watermarks are visible at a 45-degree angle under backlighting, and the colour-shifting numeral changes from green to gold (or similar) when tilted. For older notes, intaglio printing quality and the specific paper texture are the primary tells. If in doubt, professional authentication by PMG or PCGS Currency is the definitive answer.
Can I sell old banknotes online safely?
Major auction platforms and specialist paper money dealers are the most common venues. For notes worth less than a few hundred dollars, general auction platforms work well. For higher-value notes, specialist currency auctions — such as Heritage Auctions or Stack's Bowers — provide access to serious collectors and often achieve better prices. Having the note certified by PMG or PCGS Currency before listing adds credibility and typically increases buyer confidence, especially for buyers who cannot examine the note in person.