Welcome to the Quilting Board!
Valerie Smith - Pumpkin Patch Quilter
Obsessed Quilter and APQS Long Arm Machine Quilter
Looking at my WFR in the crinkle finish with a motor, it doesn't look like there is any place to attach a hand crank. These do still have a spoked wheel, but I'm not sure how you'd retrofit a hand crank to it. The motor attaches to the back of the machine with screws. There is nothing like a "motor boss" as on the ends of most Singer machines.
The only one I've seen is here: White FR hand crank pic.
I read somewhere (can't remember where) that White's were sold in the US, so not as many were made with hand cranks, mostly treadles and motorized versions.
I have a screw driver and YouTube--I can fix it!
NEVER let a sewing machine know you are in a hurry.Success is not final. Failure is not fatal. It is the courage to continue that counts. Winston Churchill
So, Pumpkin Patch, did you get the White Rotary with the crinkle finish? (I've got one in my garage...)