Hard to find 'double' bean slicer, for frenched green beans. The unit arm is adjustable in angle, made to pivot from the table clamp.
It's a vintage hand-crank model from Lauterjung, excellent quality, German made, with 5 1/2" blade wheel. There's a little wear and spotting to the finish, but it's good and sharp, and doesn't appear to have had very much use.