SP/SSW mars or gyra

Which oscillating light did the SP use?

or was it BOTH?

opinions not solicited on this. If you don't know for sure,
please don't respond.

Rick

 

And the answer is both.

http://www.trainweb.org/gyra

 

Thank you very much, and now, that said, do you know if either type was dedicated to any particular series or type or style of engine?

 

More info:

http://www.trainboard.com/cgi-bin/ultimatebb.cgi/ubb/get_topic/f/104/t/000065.html?#000000

 

It depends; some units, like GP20s, could have Mars lights on one group, and Gyras on the next. Heck, it might have depended on which brand of light was cheaper the day the locomotive order was placed. Generally though, the Mars brand lights fell out of favor by ~roughly~ the early/mid 60s, and most new unit deliveries from then on were equipped with Pyle Gyralites. As Mars lights failed (or as units were shopped), it wasn't uncommon for them to be replaced with Gyralites.

 

Also depends on the date. Mars did not make any more lights after some where between 1-77 to 8-78.