"Turkish, European Union Coins Similar
By Richard Giedroyc, World Coin News
March 06, 2008
When mints around the world plan the introduction of a new coin they are usually careful to ensure the new coin is not so close in weight, metal composition, and diameter to other coins elsewhere that a low denomination coin of one country won't be confused for a higher denomination coin of another nation."
More:Numismaster.com
