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
0037	Australia	1953	1964	Ruler Change	Elizabeth II	1	Florin	1963
0038	Australia	1966	2000	Coinage Reform		50	Cents	1966
0039	Austro-Hungarian Empire (Austria)	1892	1916	Empire	Francis Joseph I	2	Corona	1913
0040	Austro-Hungarian Empire (Austria)	1916	1918	Ruler Change	Charles I	2	Heller	1918
0041	Austria	1923	1924	First Republic		1000	Kronen	1924
0042	Austria	1925	1938	Coinage Reform		2	Schilling	1928
0043	Austria	1934	1938	Federal State		1	Schilling	1934
0044	Austria	1946	2000	Second Republic		10	Schilling	1968
0045	Azerbaijan	1992	1994	Republic		50	Qapik	1993
0046	Azores	1901	1901	Portuguese Kingdom Colony	Carlos I	5	Reis	1901
0047	Bahamas	1966	1970	Ruler Change	Elizabeth II	1	Dollar	1966
0048	Bahamas	1971	1973	British Self Governing Colony	Elizabeth II	1	Cent	1973