From the research I've done, the Philly bars ran the Sireno beacon. Don't know about where the bar in the OP came from, but Philly PD definitely ran that setup in the mid-70s.
Dang! Wished I'd gotten that. I've been wanting a Philly PD red Twin with the blue Sireno beacon on them like they ran in the mid-70s when I went to college there. Hope he can find a less faded Sireno dome.
That light looks cool with the clear lens. Cool story on how it came to be yours. Great price and nice you've got the last manufacturer stock clear lens on the planet. :)
