This is a 401A and I bought mine in June 1959. The fourth photo shows the machine from the back. Notice the plug on the left side near the bottom -- well, it is not placed in the machine correctly positioned. If it were placed accurately, there is not a problem. The bottom cover can be removed and my 401A sits in what looks like a card table. I bought the card table when I bought my 401A because I did not know what style of furniture I would want. The Singer store sold the card table with the 401A and I don't remember the price. Singer also sold a matching folding chair. In hind sight I wish I had bought four chairs with the card table and the 401A. I have the case, manual, all of the cams and the optional feet and both stitch plates (straight stitch and zigzag).