Originally Posted by
Steelsewing
The only one I can think of might be the 1955 Gritzner-Kayser model 116a shown
here.
Nope, it's just a badged Japanese machine with an added spoked wheel that just happened to have the motor boss in the right place to accept a hand crank. He put it in his Singer treadle base. Leon has done the hand crank conversion with one of his Japanese machines too.
Cari