Here is a link to a page I wrote on how to interpret Cyrillic letters.
http://ifixinstruments.com/Cyrillic%20post.htmThe Cyrillic alphabet is used to write Russian, Bulgarian, Serbian and many non-Russian languages in former Soviet-area countries.
I have been wanting to post this for a while, but could not get the gremlins to work they way I wanted. The Cyrillic letters would not show up on the forum.
While you may not understand what is written on your stamp, you may be able to determine basic information such as country of origin or airmail vs regular postage, etc. You could even use the translation page at Babelfish with a basic transliteration.
Please let me know what you think.
Dave