: 3 light signal red/green/yellow standard square head.
Berko B503 3 Aspect (R/Y/G) Standard Square Head Signal
Berko B530 3 Aspect (R/Y/G) Platform Square Head Signal
Berko B533 3 ASPECT (R/Y/G) STANDARD T JUNCTION SQUARE HEAD
Berko B801 3 ASPECT (R/Y/G) GROUND SIGNAL
Berko B551R 3 aspect (R/Y/G) standard Right offset square head
Berko B576 3 ASPECT (R/Y/G) STANDARD STEPPED T JUNCTION ROUND HEAD (TYP
