Quoted from xsvtoys:Someone (I think maybe it was Forceflow?) was angry about the decals that you currently can buy and would never use them, because they aren't right compared to the original.
It wasn't me. The only classic era bally game I've owned is baby pacman, which has a completely different coin door & decal.
But, I would be a little annoyed at significant inaccuracies. I do try to choose my decals carefully to try to get the most accurate version available.