I got the early 1970's/late 1960's Federal Sign and Signal Model A siren housing lamp from eBay for $20.00. This arrived to my place on June 26, 2014. I have no idea why it was converted into a lamp. I will use it as a lamp for now. It did not include the light bulb and wires when I got it. The siren lamp works when I wired it up and installed a light bulb.
I will show photos of it now.
That's all.