It is a 15-91. You will love how quiet it is and the power to sew thicker fabrics, like jeans. I bought one in a cabinet with stool for $100 and wouldn't think of selling it. I is a lovely machine. You can get parts from Sew Classic.com in Ohio at reasonable prices. Jennie at Sew-Classic has one like it and loves it. It is indeed a classic machine. It uses Class 15 bobbins that hold a lot of thread. It has a vertical bobbin and can be used for FMQ too. It is said it can wear out 3 ladies in its lifetime. See what you think. That is a fantastic price also.