Tachometer, Electric, Kollsman 377 Series 4000 RPM P-47 and the other for Outside

and the other for Outside pressure/altitude

the USMC air station in North Carolina

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

Included are:

Tachometer, Electric, Kollsman 377 Series 4000 RPM P-47 and the other for OutsideThis 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