Originally Posted by BoJangles

No you don't need a model number for a treadle belt. Most all treadle belts that come pre-cut and packaged are 72"s. You will then have to measure the belt to your machine, cut it the correct length and use the little staple like thing that comes with the belt to connect the ends together. Some people on here sew their belts together with dental floss or a heavy thread. Your machine (looks like a Model 127) will use the normal pre-packaged treadle belts. Most all sewing repair shops carry those belts, as do most on-line sewing stores. Just put the belt around the treadle wheel, around your hand wheel slot, cut one end of the leather off where the two ends meet, now sew/connect together. Don't put the belt too tight, but if you find it is too lose when you start to treadle, just cut and re-sew a second time.

Nancy