This appears to be a commercial meat slicer.
It is a tool used in butcher shops and delicatessens to slice various deli products, including meats, sausages, and cheeses.
The machine typically features an adjustable slicing thickness, often ranging from 0 to 15 mm, allowing for precise cuts.
It is designed to require less effort than a simple knife, while also helping to keep the texture of the food intact.
Many models include a built-in or removable sharpener to maintain the blade's edge.