Ring to use the Mutar 1.5 on bayonet 3 cameras

The Mutar lenses have the bayonet 1 ring standard. It is quite easy to make your bayonet 1 or 2 Mutar into a bayonet 3 Mutar. Suitable for the Rolleiflex 2,8E and 2,8F. For the Mutar 1,5 as well as the Mutar 0,7. In the Original box.