Aerial Refueling Telescoping Boom Indicator, KC-97L Boeing Stratotanker 1952 USAF P-47 It closely resembles the model

It closely resembles the model used in these aircraft

Has a date stamp of either Q1-1957 or 1967

5 inches wide

The knob itself is missing

Aerial Refueling Telescoping Boom Indicator, KC-97L Boeing Stratotanker 1952 USAF P-47 It closely resembles the modelThis offer is for a vintage Cold War era aerial fueling Telescoping Boom Position Indicator, made by Liquidometer PN EA 308 1, as used in the US Air Force's KC 97L Stratotanker (and likely earlier versions given its date stamp of 1952), as depicted in its Flight Manual (unfortunately the page showing the indicator does not photograph well). This indicator appeared on the boom operator's control panel and indicated the length of the refueling boom as