These two rings will make your Mutar lens (0,7 as well as the 1,5) with bayonet 1 or bayonet 3 size into a bayonet 2 Mutar. For all recent bayonet 2 cameras like the Rolleiflex 3,5F, 3,5E and others. Complete with the 3 screws.
This is a very rare item.