This is a stripped Bally Fireball II playfield with an incredibly well done mylar overlay. We received it in a trade deal for our own Fireball II, but have opted to stay with the original playfield.
This overlay does obscure significantly more light from beneath than inserts alone, so bright LED’s would be required when using this playfield.
As a wall decoration, it is absolutely gorgeous. It is very difficult to see it is an overlay at all in person, with all the amazing detail of the classic original artwork.