So here's a strange pinball related rarity that I actually just took pictures of to let go. An original and still in original shipping package 'Pin Pong' 1974 Atari schematic. Although Chicago Coin's Super Flipper is noted as the first video pinball on IPDB in 1975 - this came out in 1974 and I believe it's actually the first video pinball. It has 13 detailed pages and is roughly the size of a 27" flat screen. I think it's so detailed because the machine predates the use of ICs/Chips in the design.