One From Every Country
(or more correctly, one from every sub-entity!)
An example for each of the 1048 (of 1086) coinage types in my definitive 20th Century OFEC Collection
Note that they are in the same order as on the "20th Century OFEC Entities" page.
(I am in the process of adding images of each coin, please bear with me; in the meantime - get in touch!)

#	Sub-Entity Name	coins from	coins to	Political Designation	ruling authority	Den.	Unit	A.D. Year
0709	Papua New Guinea	1975	2000	British Commonwealth Realm	Elizabeth II	2	Toea	1981
0710	Paraguay	1900	1903	Republic		10	centavos	1900
0711	Paraguay	1908	1939	Coinage Reform		1	Peso	1925
0712	Paraguay	1944	1951	Coinage Reform		1	Centimo	1950
0713	Paraguay	1953	1953	Coinage Reform		50	Centimos	1953
0714	Paraguay	1975	2000	Coinage Reform		10	Guaranies	1986
0715	Peru	1888	1965	Republic		1/2	Sol	1923
0716	Peru	1965	1965	Coinage Reform		1	Sol de Oro	1965
0717	Peru	1966	1975	Coinage Reform		1	Sol	1967
0718	Peru	1975	1983	Coinage Reform		100	Soles	1980
0719	Peru	1984	1985	Coinage Reform		10	Soles de Oro	1984
0720	Peru	1985	1988	Coinage Reform		5	Intis	1987