Ammeter 30-0-30 amps, Battery, Type D-30, US Navy PBM-5 Mariner Cold War but the outdated cord has

but the outdated cord has been removed for safety

US Navy Type CV-22021

Despite slight discoloring of the cover

made by Kollsman PN 647K-02

This is a Course Deviation Indicator type ID-453/ARN-30 as used in the Vietnam War era UH-1 Bell Huey Helicopter

Ammeter 30-0-30 amps, Battery, Type D-30, US Navy PBM-5 Mariner Cold War but the outdated cord hasHere is an aircraft battery Ammeter, Weston model 606, type T 203, as appeared on the flight engineers panel of aircraft of the US Navy such as the patrol bomber seaplane PBM 5 Mariner (see illustration showing the location on the panel from the PBM 5 flight manual dated 1944). The battery ammeter indicates the current flow through the battery charging system. A "zero center" ammeter, during charging, shows a (+) positive reading indicating the