One school of thought is that it is an Ausculater -similar to a stethoscope. Others think it is a Convertube to aid the hearing impaired. This is a conversation tube. It has a hose with black funnel shaped fitting on one end and a small fitting round fitting on other.shipwrecked coast, flagstaff hill, flagstaff hill maritime museum, maritime museum, shipwrecked artefact, warrnambool, ausculater, convertube, hearing aid