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
0649	Nepal	1932	1953	Coinage Reform		50	Paisa	1950
0650	Nepal	1950	1950	Ruler Change	Gyanendra Bir Bikram Shah
0651	Nepal	1953	1957	Ruler Change	Tribhuvan Bir Bikram Shah (resumed)	1	Rupee	1954
0652	Nepal	1954	1973	Ruler Change	Mahendra Bir Bikram Shah	25	Paisa	1956
0653	Nepal	1971	2000	Ruler Change	Birendra Bir Bikram Shah	10	Rupees	1997
0654	Netherlands	1898	1909	Monarchy, Constitutional	Wilhelmina	2 1/2	Cents	1903
0655	Netherlands	1909	1945	Coinage Reform		10	Cents	1937
0656	Netherlands	1941	1944	German Occupation		10	Cents	1942
0657	Netherlands	1948	1948	Monarchy, Constitutional (restored)	Wilhelmina	10	Cents	1948
0658	Netherlands	1950	1980	Ruler Change	Juliana	2 1/2	Guilders	1963
0659	Netherlands	1982	2000	Ruler Change	Beatrix	1	Guilder	1986
0660	Curacao and Dependencies	1900	1901	Dutch Colony/Territory	Wilhelmina	1/10	Guilder	1901