Future Spa backglass

[braddo]

Just a question about the Future Spa backglass. I've read it has a type a 'foil' or 'holographic film' behind the word Future Spa on the backglass. I can' tell from the IPDB photos. Is this part of the print? or is this stuck on separately? I don't know what to look for so any help would be appreciated. Thanks.

[greatwichjohn]

It looks like a piece of tape from the back. Maybe its foil. It looks really strange & I think Bally only did this with Future Spa. I have owned 4 over the years. Weird box for the lights. The rest of the glass is made just like all the other Bally pins.

[Strangeways]

I've seen two Future Spa backglasses. From memory, the effect you are referring to is part of the backbox - not the backglass. The backglass is simply a standard silkscreened backglass with an "effect" - but I don't think it had any holographic film.

[braddo]

OK i found this info......

"but there should be a rectangular
box in the upper-left corner of the head insert, with (controlled) lights
inside.  It is intended to have a thin plastic foil covering it in such
a way that multi-coloured patterns are transmitted onto the backglass
(behind the "Future Spa" lettering). I believe someone on RGP said you
can get a similar foil at theatre-supply stores, to be used for stage-
lighting effects.  "

.....so the film is in the backbox not on the backglass. Cool, now i know what to look for. Cheers guys.

[Rod71]

Never seen one from the back before.  But the pics i just found online would indicate there isn't the white masking in the title like the rest of the glass.

Edit- 
Well actually the white masking is there.  But it's covered in some kind of filum.