This is a postcard which I received from my friend Janek from Estonia. He used two stamps featuring (Left) Kunda Lighthouse and (Right) Keri Lighthouse. The stamps were issued on 12.03.1998 and 15.01.2003 respectively.
The postcard feature a image of the Keri Lighthouse. You can see the image of the postcard on my blog http://www.lighthousesonpostcards.blogspot.com