I first noticed Cthulhu's Treasure Box on Tuesday and it's already filling up with interesting material. The blog, written primarily in German, focuses on documents and photographs from the classic era of the Mythos. Here's one of the more interesting tidbits:
From 1916, a laminated railway pass featuring the owner's photo pasted to the opposite side. I've been puzzled by archival pictures of what appear to be laminated IDs from long before the invention of clear thermoplastics, and this example helps to explain them. Based on the folds and adhesive stains I'm guessing that the protective film is cellophane.