I've posted a copy of the Canadian schematic in your other thread. Hope it helps! https://pinside.com/pinball/forum/topic/interflip-dragon-starting-up-#post-6054138

Story when I bought mine NIB from John's Jukes in 2006 was as follows: The original distributor in Canada went into receivership in the early 1980's and had just received a shipment of Dragons' from Interflip. Being the company was in receivership nothing could be done with the inventory. The bankruptcy/receivership was cleared in the early 2000's that allowed the inventory to be available to be sold. I believe John's Jukes bought the inventory and started clearing it out. That's when they were first available for purchase NIB. My machine was originally slated to be shipped to the U.S., but Interflip decided to ship it to Canada. On the outside of the box U.S. was crossed out and Canada was handwritten. My service socket is the proper flat blades for U.S. plugs not the round plug style you would expect in Canada.

Take a look at these notes to ensure safety and that it doesn't do any damage to the motors that have been sitting since production in 1979.

https://www.flippers.com/InterFlip.html

On my machine the only rubber that has begun to deteriorate is the rebound at the top of the playfield, everything else is still good. I need to macro photograph (1 : 1 w/36MP) my dragon drop targets before any of the art is damaged by the ball so I can print replacement decals later.