The first photo shows all of them together. I do believe the all black one is the most striking. It also is the only one I have with the different throat plate.
I noticed a difference in the height where the buttonholer attaches/screws into the needle bar. Some of them measure about 1/2" up to 3/4". This is interesting as the boxes for each do have the same model number. Now, over the years boxes and attachments do seem to get mixed up.
Now, so far none of these wonders fit my 221, 99K, 201. They all appear to be the rotary machines. I do have a Good Housekeeping machine tucked away. I just might have to get it out to see what these "Famous" might do on it.
Charlene, The Sew Box