Go to EBay, search for, ... ... Leather Belt Singer Treadle Sewing Machine 76"
$3.75 postage $4.56 from NgoSew Salem OR, US. A New Belt. For You
notes: Thread the belt around the bottom wheel up through the holes in the
table top, around the machine drive wheel, pull until tight, mark the belt
with a pen, the end with the wire clip we need to keep, that's the joiner
Unthread/Remove the belt, cut off the excess belt leather at the mark a
very sharp knife is good, as square as possible, but the two ends and mark
the belt where we need hole for the wire joiner, to keep the ends buted
together, a needle needs to be pushed through cut end, size a little larger
or thicker than the joiner, put a little Vaseline on the joiner, Re thread the belt
onto the machine, then push the joiner through the new hole, clinch the joiner wire
onto the belt, Job Done, ... ... Sew something
All the best from Downunder