I'm at work, wearing my CF-18 Canada 150 shirt, when one of my coworkers says, "Love your shirt!" (He's a plane enthusiast.) I told him I bought it in Ottawa on July 1st (2017), at the Canada Aviation and Space Museum. I also told him I bought a nice deck of cards there as well, and that the deck had a different plane on each card. He said, "Cool." I told him I collect cards and that I have over 175 decks. He said, "I didn't know you collected playing cards." I said, yup! I then told him that I'm now looking to buy older decks. He then tells me about decks that were made during the war. The decks had plane identification symbols on them so that the guys could learn them and still have something to pass the time with. I thought that was really cool! So I did a Google search for them. I found many images, but one caught my eye and I clicked on the link to it's host website ... and I got this forum! LOL!