Cath Glow Light Corporation Shelter Sign Blueprint - 1942

First off, would anyone like to build me one of these for my sign collection?

I found this while going through boxes of advertising paraphernalia sent to the NCCD during World War II. What stood out obviously with this letter was the inclusion of a blueprint for how these signs are designed. Not every day you find a blueprint. Heaven knows if any of these Cath Glow Light Corporation signs are even in existence, but if anyone would like to try making one, hopefully this information will help!