I know that photo!
After Bronica lost Nikkor as a lens supplier, Carl Zeiss was working on adapting a variety of lens designs to the Bronica MF system. More common is the 75mm, but there are other various misc lenses around. Many companies reused some of the lens designs from other MF, 35mm tele, and mated them to the bronica focusing unit, or a redesigned focusing unit compatible with a range of the manufactures lenses.