Hello,
     Im looking for information on a traffic light that I acquired.  It says A1 on the back and is a a three light signal with a  red, yellow and blue colored lenses.  It came in an Olive drab color.  Thanks W.

I don’t know anything but maybe @Econolite03 or someone else who knows a lot of info regarding traffic signals can give you a more detailed answer. I think A1 is the name of the company that made the signal.

Have you powered it up yet? The 'blue' lens is probably green. They just appear blue when not lit.

A1 was an Alhambra, Calif. based manufacturer who produces traffic signal related equipment. They are fairly popular for things such as hardware / mounting brackets, however for a period (I believe mostly the 1970s) produced a line of signal heads such as the one you’ve mentioned. Their heads are exclusive to California and are desired by collectors, especially if they have diamond-print glass lenses.

If the signal is incandescent with glass lenses, the green indication will have a blue hue went not lit. This was standard with most manufacturers in the US, and will appear the usual green when lit. Paint wise, most of their equipment was painted a dark olive green which tends to patina with age, unless the city repainted it.

For more technical details,I’d suggest viewing the signal collector-supported HighwayDivides.net Wiki page:

See Here

Hope this was of help.

Wow, you really know your stuff @Econolite03!

This helps out alot.   Appreciate it.  Thanks W.

I powered it up to verify and it’s green as everyone has stated.  Appreciate the help from everyone.  Thanks W.

Great to hear that it all works.