1980s Cook County IL Red Beacon

Can anyone ID the Red Beacon on this 1980's Cook Co SO Unit please;Cook County IL Patrol Unit

Thanks

 

[tsquale]

North American Signal 400

 

[QUICKONE]

Thank you Sir!

I've seen some other 1980s Cook Co SO Beacons that were two Bulb and I don't ever remember an 11in Action Light having only 2-Lamps.