Tachometer, Electric, Kollsman 377 Series 4000 RPM P-47 the USMC air station in

the USMC air station in North Carolina

When folded

that is in a left turn the lubber line moves to the left round the dial

and the left knob sets the course heading

and is not visible in the photo

Tachometer, Electric, Kollsman 377 Series 4000 RPM P-47 the USMC air station inThis WWII era, single engine electric Tachometer was in the 377 series from Kollsman. The pointer rotates clockwise one full rotation to 2000 RPM, and another full rotation to 4000 RPM. The aircraft from which this instrument was removed appears to have had an upper operating limit of 2800 RPM judging from the limit markings in thin red tape that have been applied upon the numerical scale beneath the glass. The type of aircraft which used this