Federal Signal BeaconRay 176A Matching Set

Another interesting light from my buddy down in TN.
Federal Signal BeaconRay Model 176A, this is a matching set with both beacons with the same S/N.

The 176 was the 4 lamp rotating beacon, and the A designated Pole mount.
SN 2R11N68P translates to.. 12VDC, 176 model, Nov 1968.