Hi,
A local museum has the object shown in the photos. It's made of wood, about 30 cm (1 foot) long. It's made of two symmetrical bars that lock together with the movable tab in the middle. The holes go all the way through. It looks like it might be for clamping something for sewing. Grateful for any help figuring this out.
It looks to be either for stretching, or a hole-punch jig. Possibly for leather book binding...?
"The only thing...more expensive than education is ignorance."~Ben Franklin. "We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light." ~ Plato