Spiratone Plura-Coat Auto 2X Telxtender for Minolta - Md Teleconverter Lens

I am listing this as used but I am not sure. It may never have been used. It was in storage with Dad's camera equipment, still in the plastic in the case. There is another one with his Minolta camera, lenses, autowinder, etc in the camera case, in another listing. This was alone. It appears this was bought or gifted to him without knowledge of already owning one and then just never used. I do not know.