I know I showed Mail heArt from Katerina in an earlier post, however this arrived before the Valentine.
In response to her triangle upside down airmail mail, Katerina sent me this. Really great stamp.
Sneak preview of the contents through the window.
The colorful insides
And I noticed on the inside that Katerina had reversed and re-used an envelope that was sent from the US, using metered mail - Interesting as well as tree-friendly.