Here's a Fisher Pierce photocontrol with an uncoated eye, that has rounded sides/flat top and bottom which is recessed more than most designs with a perforated shield.
I've been intrigued that Fisher Pierce had so many variations on their photocontrol design during the 1990's. I'm wondering if they rebranded other manufacturer's products & vice-versa. I have a Lumatrol that looks like an F-P and another that looked like an ALR, but also an F-P that has the ALR-style eye.
I agree very intriguing,they had many variations in the 90's.There appeared to be some design swapping, have a Lumatrol and Tork PC's which have the same housing design as the Fisher Pierce.