I am new to the boards. I have become interested in sewing and quilting and was just gifted a vintage singer that my roommate found at and estate sale. It appears to be in pristine condition, there are hardly even any scratches on it! it came inlaid into in the portable (heavy) box. I have made an appointment to have it serviced, but I would like to be a little more ‘smart’ about my machine before I hit the doorstops of the service center. I believe it is a 1948 15-91 or 15-90. It does not have a belt looping down on the right side of the machine, it appears to be electric, but gear driven. Starts with JC for the serial number. I cannot see the underneath, as it is inlaid into the storage box. It has the gold seal on the front, and made in Canada across the top of the machine- the lettering is still bold and bright, as is most of the gold paint on it. I will attempt to upload a picture, and hopefully you may be able to help.