From time to time the icelandic Post and later the Postphil have made up special plastic salespackings for stands in turistshops, fuelsales, bookstoores etc. These have always been closed with a special printed flap and stapled. None of this has ever been advertised by the Post and is an addition to the booklets. The icelandic philatelist and writer Thór Thórsteins belive some 15 different ones or more have been made.
Little is known of this but recently had the possibilites to get access to the Post computer to see what had been done in the past. Unfortunatly their records go now only back to 1998. In the "Frimerkjablaðið" No. 4 page 17 there was a short article asking for informations, but got no reaction from local collectors.
Thór Thórsteins is interested to write an article of these packings but need badly pictures of what is found now in collections. Have you this salespackings or informs from your iceland-hollyday before 1998/99, please write to R. Daebel - "Feedback" (images from "Frímerkjablaðið" No. 4, 2000).