With the class 15 Singer introduced a new design of needle with a flat on one side of the shank. These were built into the faceplate above the presser bar, instead of at the front of the machine. Some of the earliest models had a fiddle shaped base with the serial number at the back and used a 'long beak' shuttle.Ī particularly notable feature of the model 15 was the location of the tension assembly. It was designed for domestic and light industrial sewing and came mainly fitted into treadle tables or cabinets, with just a few supplied as hand crank machines. The Singer Company first started production of its oscillating shuttle, high arm Improved Family machine in 1879. Singer Sewing Machines 15, 15K, 15N and derived variations Singer Sewing Info