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
0661	Curacao, Territory of	1941	1948	Dutch territory	Wilhelmina	1/10	Gulden	1944
0662	Netherlands Antilles	1952	1970	Dutch Autonomous Region	Juliana	1	Gulden	1963
0663	Netherlands Antilles	1970	1985	Coinage Reform		25	Cents	1983
0664	Netherlands Antilles	1980	1985	Ruler Change	Beatrix	1	Gulden	1984
0665	Netherlands Antilles	1989	2000	Coinage Reform		10	Cents	1989
0666	New Caledonia	1949	1952	French Overseas Territory		5	Francs	1952
0667	New Caledonia	1967	2000	French Sui Generis Collectivity (from 1998)		5	Francs	1999
0668	New Guinea	1935	1936	LoN Mandate - Australia		1	Shiling	1936
0669	New Guinea	1936	1936	Coinage Reform		1	Penny	1936
0670	New Guinea	1937	1945	Coinage Reform		1	Shiling	1938
0671	New Zealand	1933	1936	Ruler Change	George V	1/2	Crown	1934
0672	New Zealand	1937	1952	Ruler Change	George VI	1	Crown	1949