But the machine was supposedly a hand model only, and this is a treadle
It’s been my experience that all of these Singer type machines that have the outboard motor attachment boss are capable of being powered all three ways, including treadle and hand crank, with the spoked hand wheel.
Some of my older machines can’t be used with the motor or utilize the hand crank as the piller mounted bolt is not on the machine. I haven’t seen or noticed a hand wheel without the belt pully/drive band channel incorporated.