This is an exact replica of the Large (1.5) Dialight/Dialco Panel Light (MPN:51-3402-01-301) used in the 1960's television series, Lost in Space. It was used on several props, most notably the Robinson family's faithful robot companion (commonly known asRobot B9"). I modeled this directly from an original that I purchased, after countless measurements were taken. This model includes threads and interior structure (including double-walled lenses) as found on the original part. Eagle eyed Sci-Fi fans will also spot these lenses in many other films and shows through the 60's and 70's. A coveted discontinued panel light component for prop builders and enthusiasts.
For members of the 3d printing community... I also have a 3d printable model listed on this site, but be sure your printer can handle details this small. Cheers!