Quote Originally Posted by AgX View Post
Not all non-Kodak coupler systems used polar Groups.
Agfa, Fuji, Konica and Ferrania all used polar couplers from the start of their "Axis" cooperation effort until the end of the war and beyond. Konica and Fuji used them until their effort to develop C41 compatible products.

Oh, I might add Oriental to this list and a few others that I have forgotten.

I have samples of polar coupler products from as late as 1960.