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
0097	Brazil	1979	1986	Coinage Reform		10	Cruzeiros	1983
0098	Brazil	1986	1988	Sixth Republic		1	Cruzado	1986
0099	Brazil	1989	1990	Coinage Reform		1	Cruzado Novo	1989
0100	Brazil	1990	1992	Coinage Reform		10	Cruzeiros	1991
0101	Brazil	1992	1993	Coinage Reform		100	Cruzeiros	1992
0102	Brazil	1993	1994	Coinage Reform		100	Cruzeiros Reais	1993
0103	Brazil	1994	1997	Coinage Reform		1	Real	1994
0104	Brazil	1998	2012	Coinage Reform		10	Centavos	1998
0105	British North Borneo	1882	1907	British Protectorate	Victoria	1	Cent	1907
0106	British North Borneo	1903	1941	Coinage Reform		25	Cents	1929
0107	Nigeria-British West Africa	1907	1910	Monetary Union	Edward VII	1/10	Pence	1908
0108	Nigeria-British West Africa	1911	1911	Ruler Change	George V	1/2	Penny	1911