It is very difficult to speak of this envelope.It is indeed very interesting and innovative. It comes from Finland. This surprising philatelic object is a "long sized"block consisting of 4 different stamps and has ski as the central theme.
So far, nothing new. The novelty comes from the material used: a synthetic fiber, whose name I do not know, and it causes the motion of the pictures whenever we change our position. The pictures shown are static. However, when we have this over in our hands, we see whole cold and snowy landscape moving. This concept is not new. But postage stamps made with such material is an inovation, at least for me...
Really great.
Thank you so much, Anne-Lisa!
