For Sale Zeiss Magnar 4x for Rolleiflex Bay 1

This Zeiss manufactured Magnar 4x is designed for the Rolleiflex bayonet 1 mount to provide a 4x tele lens attachment. Apparently, only about 500 were ever produced of these. I have owned this one for many years, but never bought a matching bayonet 1 camera, so it's time to let it go. The lens is in very good condition, especially considering its age. No front/end caps, unfortunately.

Asking $250 plus insured shipping. PayPal only.