Joefischer wrote:Is there an easy way to figure out the approximate age of this?
Welcome, Joe.
12" signals were first produced by a few companies probably around 1950. Looks like you have a Marbelite from roughly the mid-late 1960s, by my estimate.
The first 12" model made by Marbelite had housing modules that were welded together from a few parts. That model was evidently not produced very long, and is extremely hard to find, either on the street or in anyone's collection. Next came the cast that you have there. The earlier examples of your cast more likely used the Kopp diamond patterns lenses, then a bit later, the brick pattern you have there was used. Sometime, possibly around 1970 (a guess, really) that model was altered slightly, most noticeably by the addition of a raised lip around the door perimeter. I think yours falls roughly in the middle of the Marbelite 12" signal timeline, which spans from about 1950 to about 1978.