I know very little about these except that they obviously all advertise the delights of the places they come from. The Montreal one looks like it set out to promote the city ahead of the Olympic Games being hosted there in 1976 and you can see that the reverse side of the Lanzarote and Amsterdam cards is to write home to your loved ones on. Being that the grooves are pressed into the card on a wafer-thin transparent flexi overlay the music on these discs is virtually unplayable and, as you can see from the photos, pressing music onto cardboard has the draw back of it bowing which make it impossible to play with the needle skipping.  As a bonus to the post I’ve added this Yugoslavian souvenir from the stalactite caves of Postojna released by the  tourist agency of Zagreb. The two records are 6″s and the slides are missing from this version. This is listed on Discogs in multiple versions with different covers and languages, I expect it was sold in the gift shop at the caves. Unfortunately none of the music or speech contained here is that interesting so I’ve not included sound files.