
There are many collectors of the various coin issues from different countries within the EU. And also many who are interested in the stamps released featuring the coinage.
The 10th anniversary of the currency was commemorated with stamps in 2009 by many of the EU member countries, some of which are shown below. For more see freestampcatalogue.com.
Malta adopted the currency in 2008 and released the below stamp sheet.
Bosnia and Herzegovina became a euro user in 2002.
Lithuania joined 2015.