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
0397	Haiti	1949	1956	Coinage Reform		10	Centimes	1949
0398	Haiti	1958	1970	Second Republic		5	Centimes	1958
0399	Haiti	1972	1985	Coinage Reform		10	Centimes	1975
0400	Haiti	1986	2000	Third Republic		5	Centimes	1997
0401	Hejaz	1916	1922	Monarchy	Hussein bin Ali	40	Para	1917
0402	Hejaz	1921	1925	Coinage Reform		1/4	Piastre	1921
0403	Honduras	1881	1920	Republic		2	Centavos	1910
0404	Honduras	1931	2000	Coinage Reform		1	Lempira	1935
0405	Hong Kong	1863	1901	British Colony	Victoria	10	Cents	1901
0406	Hong Kong	1902	1905	Ruler Change	Edward VII	50	Cents	1902
0407	Hong Kong	1919	1936	Ruler Change	George V	10	Cents	1935
0408	Hong Kong	1937	1951	Ruler Change	George VI	50	Cents	1951