First stage of the Calypso, the standard model of Aqualung. It was overhauled in December 2022 and has not been used since the overhaul. Usage history: Approximately 100 dives (shows signs of use such as plating peeling). Overhaul history: December 2022 (unused since overhaul). Confirmation: Airflow test performed before listing, confirmed normal operation. *This is equipment that is vital for life. Although it has been overhauled, it is recommended to re-inspect it before use as several years have passed.