Looks like a checkering tool.

[abunaitoo]

My Grandfather was a tailor.
When I was young, I remember playing with the manual peddle of the sewing machine.
He must have had a heavy duty machine because there used to be a lots of leather around.
Machines were given away when they knocked down the house.

[dikman]

Sounds like they were probably industrial machines if they sewed leather. Hope they went to good homes.

[abunaitoo]

I wish I had one of them. Could have learned to use it, and made lots of covers.
They were the old, non electric type. Only foot power to work it.
No idea who got them.

[jetinteriorguy]

As far as I know the only clones of Singers I'm aware of are Consew's. They originally started out as rebuilt Singers that were rebranded, but due to demand for cheap machines they eventually cast their own heads and built them from the ground up. I never cared for them, the vertical shaft for the foot was secured by a set screw, not a clamping collar, and had a tendency to slip due to a poorly designed slip clutch. Once this happened, you had to pull them apart to make sure all oil was cleaned off the shaft and set screw and arm or it would just slip constantly. A real PITA to constantly be doing this and retiming everything. They also used a reciprocating shuttle versus a rotary shuttle, causing uneven and premature wear on the race, making timing them even more of a nightmare. Real men use Durkopp Adler, now there's a sewing machine.

[abunaitoo]

No idea what brand they were.
Just didn't matter back then.
Wish I still one of them.
Grandfather used to work on Schofield Barracks during WWII.