Liechtenstein mystery

Denise McCarty in her World of New Issues column in the latest edition of Linn's writes, "Liechtenstein Post has placed a mystery to unravel in its new Europa stamp pane."

Liechtenstein issued the stamp sheetlet shown here last week as part of the 2008 Europa theme. In the selvage is a love letter.

The question is - Who is the letter to?

According to Denise Liechtenstein Post will give away 20 yearbooks to postal customers who figure out "to who or what is this letter addressed."