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
0517	Korea	1898	1902	Empire	Gwangmu (Gojong)	5	Fun	1902
0518	Korea	1905	1907	Empire-Japanese Protectorate	Gwangmu (Gojong)	5	Chon	1905
0519	Korea	1907	1910	Ruler Change	Yunghui (Sunjong)	1/2	Chon	1908
0520	Korea, North	1959	1987	Dem People's Republic		1	Won	1987
0521	Korea, South	1959	1961	Republic		50	Hwan	1961
0522	Korea, South	1966	1982	Coinage Reform		5	Won	1972
0523	Korea, South	1982	2000	Coinage Reform		100	Won	1986
0524	Kuwait, State of	1961	2000	Emirate	Abdullah III Al-Salim Al-Sabah	50	Fils	1961
0525	Laos	1952	1952	Monarchy	Sisavang Vong	20	Cents	1952
0526	Laos	1980	1980	Peoples Democratic Republic		50	Att	1980
0527	Latvia	1922	1935	First Republic		1	Lats	1924
0528	Latvia	1937	1939	Coinage Reform		1	Santims	1938