Any guess as to what this is?
Some kind of a cutting device.
Toe nail clipper for really big toes? :|.)
what is a shingle cutter?
Looks like one of the many 9" x 9" rubber or asbestos tile cutters.
Label on the Tool identified it as an “Asbestos Tile Cutter”.
very nice find, I would love one of those for my collection, interestingly it is not only a cutter but also a punch, the vertical piece closest to the handle is a punch for making nail holes in the tile.