From 1976 (Check the IPDB listing). This was one of the very first commercial "solid state" machines ever made. Allied Leisure was a coin operated amusements company based out of Florida. They're more known for their "cocktail style" pinball machines but their other claim to fame is the first SS style machine made earlier in 1975 (Rock On). Thunderbolt is the second SS playfield released by them. The machine is in great running shape and in relatively good aesthetic condition. The digital scores do lite up, those photos were taken when we were replacing a fuse on it. Comes with game manuals/schematics as well as some toppers we just recently purchased for it. (Potentially open for trade) Feel free to ask any questions!