Patina
Surface film or discolouration caused by oxidation sometimes found on older silver, copper or bronze coins. A nice patina can add to the value of the coin considerably.
Pattern
Coin struck from official dies but not intended for circulation, such as for demonstration or specimen test purposes only.
PGCS
Professional Coin Grading Service, a leading third-party coin grading service located in USA.
Piedfort
A coin struck on a blank that is thicker than normal, usually twice as thick. Example: A Piedfort £2 is a £2 coin that is twice as thick. Increases the weight of high value metal coins like silver.
Planchet
Known in the UK as a Blank, this is the (usually) circlular metal disk ready to be used to make a coin.
Pleidiol Wyf i’m Gwlad
Meaning: 'True am I to my country’, from the Welsh National Anthem.
Portrait
Engraving of a person, especially one depicting only the face or head and shoulders. Sometimes called a bust.
Pro Tanto Quid Retribuamus
Meaning: 'What shall we give in return for so much.' The Motto of Belfast
Proof
Coins specially struck for collectors using polished dies and blanks, giving a mirror finish and raised areas which may be frosted in appearance.
Proof Set
A set of proof coins sold by the mint, usually connected by a date or theme, like a 2001 sovereign set. See the Royal Mint Proof Sets Section.
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 | 1970 - 2025 Annual Base PROOF Set Coins Royal Mint UK . Limited Edition Certifi £ 210.98 |
 | 2022 ROYAL MINT FREE 13 COIN PREMIUM PROOF COIN COMPLETE SET STUNNING COINS!👇🏻 £ 175.42 |
 | 1980's Proof Sets Most Available All With Original Packaging As Issued Condition £ 14.45 |
 | 1982 Coinage Of Great Britain And Northern Ireland Royal Mint Proof Coin Set £ 14.75 |
 | 1995 UK ROYAL MINT PROOF SET OF COINS(230) £ 17.99 |
 | 2008 ROYAL MINT EMBLEMS OF BRITAIN SILVER PROOF CASED SET COINS & 1970 PEOOF SET £ 149.99 |
 | 2018 ROYAL MINT UNITED KINGDOM PROOF COIN SET - DELUXE COIN COLLECTION £ 179.99 |
 | ROYAL MINT PROOF SETS BLUE DELUXE 1983 TO 1999 BIRTHDAY PRESENT COIN YEAR SETS £ 29.99 |
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Numismatics is the study of coin collecting and it also has its own language with many words and terms. Our Glossary of Numismatic Terms give the explanation to some of these coin collecting words. To contribute terms please email them to glossary@coinsnotebook.com.