Sieger brand German can opener that works completely different than American types. You force the cutter through the can, then drag it around the edge. This one also has the name J.G. Leistner Chemnitz on the handle. This design was popular in Germany for a long time and cheap crappy versions are still available in stores. This is an earlier style, made from steel and wood. It is in decent condition with some wear and rust. It is usable, but it needs a good cleaning. The cutter and teeth are still decently sharp.
