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.
List items on:
 | 1967 Great Britain Coinage Proof Set 6 Coins Half Crown Florin Sixpence etc £ 9.68 |
 | ROYAL MINT PROOF COIN YEAR SETS 1970 TO 1982 BIRTHDAY COIN YEAR SETS £ 17.99 |
 | 1998 UK Royal Mint Deluxe Proof Coin Collection 10 Coin Year Set in Red Case,COA £ 31.89 |
 | Red Leather Deluxe Royal Mint Proof Sets 1985 to 2007 Choice of Set Birthday £ 69.99 |
 | Royal Mint 2011 UK Standard Proof Coin Set 14 Coins Boxed COA Booklet £ 146.29 |
 | 1966 British Specimen Coin Set in Holder, 8-Piece, Ungraded Uncertified £ 9.33 |
 | 2002 ROYAL MINT UNITED KINGDOM PROOF SET - FLAT CASE - DELUXE COIN COLLECTION £ 37.99 |
 | 2026 Annual Base Proof Set 13 Coins Royal Mint Pack with CoA £ 199.00 |
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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.