Patina
Surface film or discolouration caused by oxidation sometimes found on older silver, copper or bronze coins.
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.
List items on:
 | 1998 SIVER PROOF COIN SET Ladies of Freedom £ 225.00 |
 | 2024 Annual Base Proof Set 13 Coins With Salmon 50p Mint UK COA. Limited 7500 £ 175.00 |
 | 2009 UK PROOF 12 COIN SET INCLUDING KEW GARDENS 50p. IN LEATHER CASE + CERT. £ 320.00 |
 | ROYAL MINT, 2014 UK PROOF 14 COIN SET. COLLECTORS EDITION. COMPLETE. £ 140.00 |
 | 1985 Proof coin set - 7 coins, penny to one pound (blue case) £ 17.50 |
 | ROYAL MINT UK Proof Set Metal Medallion Tokens - 1970-2021 - Choose Your Year(s) £ 1.99 |
 | 1776-1976 US Mint Bicentennial 3 Coin 40% Silver Proof Set £ 25.00 |
 | coin sets uk £ 100.00 |
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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@coinparade.co.uk.