Manifold Pressure Indicator, Dual Engine, S2E Tracker, P2V-7 Neptune

This is a Magnesyn-type Manifold Pressure Indicator for a dual engine aircraft, made by Bendix, as appeared in aircraft such as the Grumman S2E Tracker and Lockheed P2V-7 Neptune Antisubmarine Warfare aircraft (according to their flight manuals, see photos of the gage as it appears on the S2E pilots instrument panel) of the United States Navy during the 1950-70's. 

The instrument is in exceptional but experienced condition given its age.  The dial markings are clear and the glass and case are intact. The case may have been exchanged with the dial, as the case has a label as a torque indicator.  Would be a terrific addition to any collection of Cold-War-era aviation memorabilia.