Any 'fact' that I have some sort of actual documentation for, I'll note with a '(D)'
Okay, first, the players:
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- General Electric (Schenectady, NY) - supplied NYC with signals from the early to mid twenties (D)
- AGA (Elizabeth, NJ) - Eventually sold their signal division to SSC who in turn, later sold out to Marbelite (D)
- Marbelite (Tribeca, NYC) - Sold a Ruleta knockoff in 1939 (D)
- Horni (Tribeca, NYC) - Sold many different styles of signals throughout the years, including a Ruleta knockoff in 1939 (D), went out of biz in 1945 (D)
- Ruleta (NYC??) - Manufactured traffic signals for NYC as early as 1924 (kinda D)
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I'll post some speculative theories from an ongoing email thread between 3LiteGuy and myself shortly.