I scored it simply because they were tearing-down the old firehouse and was asked to help get rid of all the old equipment in the basement. Slippery old moisture-soaked ladders, rotten leather fire helmets, rusty axes and tarnished old copper and brass fire extinguishers. Nozzles so tarnished they were tossed because nobody could tell they were brass!
I called dibs on the A/B and a few other lighting "gems" and there was no argument. There was a "donation" to the "fire bells" in that town for the nice score but compared to what that thing is probably worth, I felt it was minuscule...
The other thing you have to remember with your CJ, Model 15 and your Sireno beacon is that those units are Stainless steel and chromed brass. This is a cast aluminum base w/ a chroming so thin that you can still see the scratches in the aluminum where outside was filed and polished before it was chromed. SUPER-Thin chrome coating. Lousy workmanship. Who knows who Mars had do their chroming. I'm sure they farmed it out... Probably why it rusted. Again, early 70's, probably one of the last A/B's built=cheap chrome. They probably didn't care much at that point.
By the way, the serial number reads #1221.
I also didn't know they made those with all colored bulbs like mine. I've only seen the clear sealed-beams to the front with one on an old truck near me w/ an amber rear-center bulb but I'm guessing that was swapped-out later in its life...
Personally, I'd like to put clears in the front/center and an amber rear-center but again, it wouldn't be original to this unit. This is a piece of untouched history that is undisputed as to its originality. I have to keep it as such for posterity.