Beer labels?

When I was blessed to visit Iceland, we went to the National Museum of Iceland in the capitol city, Reykjavik. Of course I had to peek into the archives. One set of shelves with big binders really caught my eye:

All of those binders were full of sheet protectors covering BEER LABELS! Icelandic beer, I guess. Didn't look at all of them. Isn't that the most unusual thing to find in an archives??