TC25-231 PULL CHAIN DRILL. Uncommon variation on the bow drill in which the drilling motion is produced by pulling on a spring-powered armature that automatically returns. There are a few versions around but all are uncommon; this one is 13-1/2" long with a japanned cast iron frame and wooden handle, drum and knob. Unmarked. Japanning is about 50%, chuck is missing its jaws, wood has moderate wear but return mechanism works smoothly. From the collection of Jim and Christa Schoenky. Good 60-120