A vintage Singer Company Heavy Duty sewing machine. Model 5522. The Singer 5502 sewing machine is a mechanical sewing machine that offers a variety of features to assist with different sewing projects. It has 13 built in stitches, including basic, decorative, and stretch stitches. The machine also includes a four-step buttonhole function for creating buttonholes easily. Some key features of the Singer 5502 sewing machine include adjustable stitch length and width, adjustable tension control, automatic bobbin winding, and a free arm for sewing cuffs and sleeves. It also has a built in storage compartment to keep your sewing accessories organized. Marked with a brand logo on the front and on the backside. Marked, made in Taiwan NB for The Singer Company 621B. Numbered, NB4189488, on a metal plaque. Presented in an original box. Collectible Electric Devices, Industrial Sewing Machines, Miscellanea.