Wing Leading Edge Temperature Indicator, US Navy 1960 P-3 Orion BOAC The knob adjusts the indexing

The knob adjusts the indexing 'aircraft' within the dial to align the perspective of the pilot to the horizon indicator

Other chapters appear to be intact

made by Kollsman part number 815BX

but we recently sold another with US Navy label on its case and 1955 service label

The dial measures 2

Wing Leading Edge Temperature Indicator, US Navy 1960 P-3 Orion BOAC The knob adjusts the indexingThis offer is for an authentic Wing Leading Edge Temperature Indicator, Type 8, Model 1122, made by Fenwal for the US Navy's Sub Hunter Patrol Bomber Lockheed P 3 Orion. This instrument appeared on the P 3 Flight Status Panel in a section called Wind Leading Edge Skin Temp, where the condition of the wings were monitored during flight. The scale reads from 50degC to 175degC. It red lines at 110degC, whereby a red light would illuminate on the panel if