Yes, I called the store where I bought it and they gave me:
Which matches the model number on the Manual, GJSR2130.
Maybe the letters are specific to the store?
Here are some links that I found on the web for this model?
But none of them are my problem!
Is my money refunded?
I found the knob on another site,
White timer knob used on some GE brands clothes washers 1995 and later.More Information
This also looks like it, but it's called Knob Assembly Control? Seems to have mechanics accompanying it on the back.
So I took a picture, here is the knob from my washer