Photocells
Charles Endirect
Fisher Pierce
Haromarkt/Incatron North
Horstmann
Hy-Lite Controls
Longjoin
Royce Thompson Electrical
SELC / Westire
Sirebeck
Lucy Zodion (Fisher Karpark/Cableform)
Unknowns
Specials
SS32
These cells are both made by Fisher Karpark.