Hi, I have a 1969 Gottlieb Skipper and I need to replace a pop bumper coil - but it is burnt to a crisp and the others seem to have been replaced with a coil that doesn't have the number on the wrapper, or it just faded off with time.

Anybody know? I'm not next to any of my machines right now so I can't check for reference on other ones - and would not be sure how long they kept it the same between machines, as this machine has traits of 70's games (first machine with chimes, etc.) while also having a lot of traits of the 60's of course like small flippers and only four reels for each player, don't even know IF they changed them between the decades or anything like that. Thanks!