Just completed, this piece has been of my project shelf since the early 90s. I purchased this at a swap meet around 1991. The clear plastic, gold checker board panel was broken and part of the center section was missing when found. I had no idea how to fix back then, so it's been sitting on my project shelf all this time. While doing some house-cleaning recently I decided to either fix or toss it. So I fix it I did and it didn't turn out too bad.
Here's what I did:
FIRST; there was enough of the broken reverse painted cross hatch plastic to use as a pattern. I scanned the small remaining section that was still good enough for use as the pattern. I replicated the gold cross-hatch a section at a time, digitally pieced it together as one large photo file and printed it on heavy paper.
SECOND; I had a plastic shop cut and shape a piece of clear acrylic in the shape you see and overlaid it on my printed, gold cross-hatch piece. Then I secured it to the metal back panel with small nuts and bolts.
THIRD; since the center section (bottom area between the two grey end pieces) was missing, I fabricated the black center piece with the red "ZENITH" text.
FOURTH; I replaced the AC cord with a new one and installed LEDs in place of the incandescent lamps. Secured all together with bolts & nuts (the same way it was originally done).
NOW; I have no place to display it in my radio room, so it's for sale and my asking price is no where near the value of the time I spent on this project.
It measures 14" wide and 12" tall.