THis is a 301 A slant shank. Often refered to as the big sister of the 221. It is a great machine with better clearance then the 221. As well as better visibility of the needle becasue of the slanted shank. The bobin case and the bobbin are the same as the 221. The weight is 16 lb. as compared to the 11 pounds of the 221 The 221 weight however is just the machine with the carrying case it adds enough to weighas much as the 301. If you need a manual go to International sewing machine collectors society- for free. The motor is .53 amps as compared to the 221 .4 amp motor. Most likely this was made in Anderson South Carolina which you can verify from the Singer web site under serial numbers 301 is a very nice machine with great control- especially if you are doing more then zipping through a straight seam. I create original works for demonstrating the capabilities of the vintage machines we work with and have found the 301 easier to work through turns with then the 221 because I am able to get a better view directly over the needle rather then look around a tension knob.