Check out this massive collection of midcentury matchbooks shared by redditor buzzsaw_and_dynamo who also aptly dubbed it mega. Specifically the "mega album of pictures of my dad's matchbook collection". He has taken beautiful photographs and nicely arranged the different artwork on the inside and outisde of each cover into a single image. Below is just a sample of what you're in for. Be warned! There are 136 images in the set.