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
0817	Somali Democratic Republic	1976	1984	Coinage Reform		10	Senti	1976
0818	Somaliland, Republic of	1994	1994	Republic		1	Shiling	1994
0819	South Africa, Union of	1923	1936	British Dominion	George V	3	Pence	1933
0820	South Africa, Union of	1937	1952	Ruler Change	George VI	5	Shilings	1947
0821	South Africa, Union of	1953	1960	British Commonwealth Realm	Elizabeth II	5	Shilings	1960
0822	South Africa	1961	1964	Republic		20	Cents	1963
0823	South Africa	1965	1990	Coinage Reform		1	Rand	1966
0824	South Africa	1989	2000	Coinage Reform		20	Cents	1997
0825	South Africa	2000	2000	Coinage Reform		5	Cents	2000
0826	South Arabia, Federation of	1964	1964	British Protectorate	Elizabeth II	1	Fils	1964
0827	Spain	1896	1927	Monarchy	Alfonso XIII	1	Peseta	1904
0828	Spain	1933	1938	Second Republic		25	Centimos	1937