Aftermarket 9-3/4 Chisel Bit for Cable Tool Drill

- 9-3/4" Chisel Bit for Cable Tool Drill - Used - for well drilling rig (oil gas memorabilia), - appears to have a good API tool joint thread but not sure what size thread or what length the bit is. - Presumably American manufactured with carbon and/or alloy steels, but unsure if this is Acme, Spang, Gill Rock Drill, Ideco, Trident, Rampp, O.W.S. Co., Keystone or maybe another historical tooling manufacturer. - If you require thread protector(s) on tool joint(s) add another $15. - Located in Mifflinburg, PA USA