Hello,
To cut a long story short I have broken the Backglass on my Bally Party Zone.

I am in the process of getting replacement glass. I need to find out the correct size. I found this info at
http://www.marvin3m.com/The size of the glass covering the translight on nearly all WPC games is 18 7/8" x 27" (Safe Cracker uses 18 7/8" x 19 1/2). The glass thickness is what most hardware stores call "double thick" glass, which is about 1/8" thick. Tempered glass can be used for the translight, but really it is not needed there (unlike playfield glass which must be tempered!) Note backglass assemblies changed with WPC-95, when Williams changed to the "light tub" to hold the backbox lighting. The translight channels are wider than previously used. WPC-95 translight lift channel part numbers are WLL-03-9420 for the bottom lift channel, WLL-03-9421-1 for the top channel, and WLL-03-9421-2 for the (2) side channels.
The width seems ok but the hight does not seem right, it is too short. Does anyone know the dimensions of the Backglass? I was going measure the Translight size but I am not sure if the glass is bigger, smaller or the same as the Translight, I never really took to much notice before.
BTW it took me about 3 hours to clean up all the glass!
Ryan