The graflex series c only came with the cooke 6.5 f 2.5 lens where ever it was sold. Your probably right Ian. It was likely made just for this model camera. I'm probably going to get it, though I'll have to check to see it I am going to have problems with the magnesium barrel. The shutter is hung up so I might have problems there too. Hopefully it will be a easy fix. I'm interested in it for it's shallow depth of field and hopefully swirly look. I'll pick it up tomorrow, and we'll see