Are these really S&W beacons? I don't think so since the internal components appear to be Yankee 350 (2-bulb) and 354 (4-bulb) products of the 1970's. The base, dome band, and dome are a style unique to the EEC (Emergency Equipment Corporation) and S&W versions while Yankee's version of the dome featured a pop-up area over bulb carriage. Regardless, they are rarely seen today, especially with a correct dome.