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
0385	Guinea, Portuguese	1952	1973	Portuguese Overseas Province		10	Centavos	1973
0386	Guinea-Bissau	1977	1977	Republic		5	Pesos	1977
0387	British Guiana and West Indies	1891	1901	Monetary Union	Victoria
0388	British Guiana and West Indies	1903	1910	Ruler Change	Edward VII	4	Pence	1903
0389	British Guiana and West Indies	1911	1916	Ruler Change	George V	4	Pence	1913
0390	British Guiana	1917	1936	British Colony	George V	4	Pence	1918
0391	British Guiana	1938	1945	Ruler Change	George VI	4	Pence	1945
0392	Guyana	1967	1992	British Commonwealth Realm	Elizabeth II	10	Cents	1967
0393	Guyana	1970	1970	Republic		1	Dollar	1970
0394	Guyana	1996	2000	Coinage Reform		1	Dollar	1996
0395	Haiti	1881	1895	First Republic		20	Centimes	1895
0396	Haiti	1904	1908	Coinage Reform		10	Centimes	1906