Here is a list of pieces that are definitely medal-coins; All Turks & Caicos Islands pieces. Any Manx piece denominated in Crowns,especially the 1/5 Crown & 1 Crown pieces struck by the Pobjoy Mint. All modern Order of Malta proof pieces. All the 1969 Pope of Rome visit pieces from Uganda. The 1966 Malawi Republic Day Crown. All Tokelau Islands 1 Tala & 5 Tala. All Western Samoan pieces 1 Tala upwards. All New Zealand large $1 pieces upwards. All proof-only pieces from South Africa,N.Z.,Great Britain,etc. All Andorran pieces 1 Centim upwards. Both pieces from Bophuthatswana.
A medal-coin is a piece that is not intended to circulate.It may be because the intrinsic value is too high,such as in the case of the Pope of Rome visit pieces from Uganda.The coinage unit is not commonly used in the country.The piece is not available at face value.
That definition (unless i'm taking the ambiguity to extreme) would apply to all modern US $ and 1/2$ commemoratives, proof sets and BU sets, Silver Eagles etc; all UK coins produced for the collector such as proof sets/ BU sets, silver strikes, piedforts, bullion issues such as the Brittania series etc; the same for almost every other coin producing country.
