Postcards!

Here's a long shot but hopefully someone might remember. Back in the late 50's/early 60's I participated in the sending & receiving of picture postcards showing scenes of the area one lived in. I guess one joined up & received a list of folk & their addresses & you sent them pc's & in return you received pc's from them. If I remember correctly it was called the International Postage (or postcard) game. Does anyone remember this please? I still have some of the cards I received all those years ago.