Well cleaning drilling service rig accessory with dart valve for removing dirt water etc.
Short around only 6 ft. length
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