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
0001	Afghanistan	1901	1901	Emirate under British Suzerainty	Abdur Rahman Khan
0002	Afghanistan	1901	1919	Ruler Change	Habibullah Khan	1	Rupee	1903
0003	Afghanistan	1919	1924	Independent Emirate	Amanullah Khan	1/2	Rupee	1922
0004	Afghanistan	1925	1928	Monarchy	Amanullah Khan	1	Afghani	1927
0005	Afghanistan	1928	1930	Saqqawist Emirate	Habibullah Kalakani	1/2	Rupee	1929
0006	Afghanistan	1929	1935	Monarchy	Mohammed Nadir Shah	1/2	Afghani	1932
0007	Afghanistan	1933	1961	Ruler Change	Muhammed Zahir Shah	5	Afghanis	1961
0008	Afghanistan	1973	1973	Republic		5	Afghanis	1973
0009	Afghanistan	1978	1981	Democratic Republic		5	Afghanis	1978
0010	Albania	1926	1931	First Republic		1/2	Lek	1926
0011	Albania	1930	1938	Monarchy	Zog I	1	Frang Ar	1935
0012	Albania	1939	1941	Italian Occupation		1/2	Lek	1940