That sewing machine is a Red Eye, (or some name very much like that).
Its a later machine for a treadle. Probably 30's.
See the little chrome plate on the bed near the needle? See how it slides out the same direction as the machine bed? This means it has a bobbin. A little spool of thread inside a case under the bed, that spins round and round.
Singer could not use a rotary hook until White's patents ran out.
The rotary hook changed sewing forever.
Now see this? Look at the plate?
This is a shuttle plate.
Instead of a rotary hook, this uses a pill shaped shuttle that whizzes back and forth underneath like a weaver's loom. This was Singer's invention that started machine sewing in the first place.
But it was nowhere near as good as a rotary hook and bobbin and nobody used a shuttle the second White's patents were up.
Oh, this Singer is an early electric. 19teens vintage as you can see by the Flora Dora decals. Its probalby 20 years older than treadle shown.
Its rheostat for this machine is nowhere near as masculine as the rheostat shown in this thread.
A leather or industrial sewing machine? Sure. Could have been for that easy. But not a household sewing machine.
yours Scott
