An ancient Suntour GT rear derailleur has been pressed into service. I am looking for a long cage Simplex full alloy derailleur to replace it, but until then it works a treat.

The freewheel is an equally old Suntour that is a compilation of about 6 freewheels to make up a 6spd cluster, 13T-17T-20T-24T-28T-32T. It least that is what it was at the time of the photos.