From what I've been able to determine, my machine is a 201-3. I wanted a 201 with the light in the back so I could avoid the 201 tattoo. I have a slight brain injury so reaching under the light, if in the front, would be a problem for me... I can focus on just a few things at one time.
I'm happy with the machine! It's humming so quietly as it sews. I can't find a manual for a 201-3 online anywhere though. Don't really need one really...