Ancient Greece (Specifically Athens)

2 Euro Commemorative Coin - London 2012 Olympics

Eurozone (Issued by various Eurozone countries) · 2012

Satang Coin

Thailand · 2523 (1980 AD) (Based on Buddhist calendar year 2523, the Gregorian year is 1980, assuming it's a 1980 50 Satang coin.)

Indian Head Cent

United States · 1863

1 Leu

Romania · 1978

Cyprus 5 Pounds Gold Proof Coin

Cyprus · 1992

Canadian One Dollar Banknote (Scenes of Canada Series)

Canada · While the exact year isn't visible, this design (with the specific portrait of Queen Elizabeth II and the signatures visible) was part of a series issued from 1973 until the introduction of the dollar coin in 1987. Without closer inspection of the serial number's prefix or specific signature combination, a precise year cannot be determined from the image, but it falls within this 1973-1987 range.

Kentucky State Quarter

United States · 2001

Hong Kong 1 Mil (Queen Victoria)

Hong Kong · 1863

50 Euro Cent

Austria · 2007

Jefferson Nickel (Wartime Issue)

United States · 1944

Louisiana Purchase Nickel (Peace Medal Reverse)

United States of America · 2004

20 Centavos

Brazil · 1945

Two Pound Coin (Technology Series)

United Kingdom · 2007

Maravedí

Spain (likely Castile or Aragon) · Late 15th to early 17th century (difficult to determine exact year from image)

100 Rupiah Banknote

Indonesia · 1984

5 Francs

Belgium · 1940-1941 (specifically 1941, based on the visible '1941' under 'BELGIE')

2 Euro Coin (German)

Germany · 2018

Septimius Severus Denarius

Roman Empire · 193-211 AD (specifically circa 202-210 AD)

50 Pfennig

Germany (West Germany) · Specific year cannot be determined from the image, but this type was issued from 1949 to the early 1990s.

Jefferson Nickel

United States · 1995

Washington Quarter

United States · 1985

2 Stotinki Coin

Bulgaria · 2000

5000 Lei

Romania · 2002-2004 (Specific year not visible, but this type was issued within this range)

Chinese Zodiac Coin

China · Varies (typically issued every 12 years)

Empire of Korea 1 Chon

Korea (Korean Empire) · 1902 (Gwangmu 6)

2 Euro Commemorative Coin (10th Anniversary of EMU)

France (indicated by 'RF' on the other side, or by mint marks if visible) · 2009

Treaty of Rome 50th Anniversary Commemorative Coin (2 Euro)

Ireland · 2007

Kennedy Half Dollar

United States of America · 1972

1 Penni

Finland · 1974

Lincoln Bicentennial Commemorative Silver Dollar (Proof)

United States · 2009

20 Euro Cent (Italy)

Italy · 2007

Hawaii State Quarter

United States of America · 2008

Turkish Lira Banknote (Banknot)

Turkey · This is a banknote, not a coin. The year of issue will be printed on the banknote, usually as a series date or actual issue date. Based on the design, specifically the portrait of Atatürk and the "ON TÜRK LİRASI" text, this appears to be a 10 Turkish Lira banknote from the E9 Emission Group, which started circulating in 2009. The text "14 OCAK 1970 TARIH VE 1211 SAYILI KANUNA GORE CIKARILMISTIR" on the banknote refers to the legal basis for issuing banknotes in Turkey, not the actual issue date of this specific series.

1/2 Franc

France · 1967

5 Swiss Francs - William Tell

Switzerland · 1974

Ukrainian Karbovanets (banknote)

Ukraine · 1992

5 Pesos

Mexico · 1972

100 Pesetas Coin (Franco Period)

Spain · 1966 (though often minted until 1975, the year 1966 is usually the base year for this type, with varying 'stars' indicating actual mint year)

Lincoln Cent (Lincoln Memorial Reverse)

United States · 1990

1 Euro Coin (Slovenian National Side)

Slovenia · 2008

Five Pence Coin

United Kingdom · Due to the commonality of this design (introduced in 2008) and the lack of a visible date in the image, it is difficult to determine the exact year. It could be any year from 2008 onwards until newer designs are introduced or the coin is demonetized. The change in composition to steel plated with nickel occurred in 2011 for cost-saving measures, which can help narrow down the date if the coin's weight or magnetic properties are known.

20 Stotinki

Bulgaria · 1999