Altimeter, Mk XIIIC, 30,000ft, British Royal Air Force Ref 6A/445 A4 Skyhawk This is a Field Manual

This is a Field Manual for the Identification of German Aircraft published for US Military Intelligence by the War Department in March 1942

This electro-mechanical system computed positions based on a series of dead reckoning inputs

and all components may not be present

4 inches wide

See photo from the B-47B Flight Manual showing the location of this instrument

Altimeter, Mk XIIIC, 30,000ft, British Royal Air Force Ref 6A/445 A4 Skyhawk This is a Field ManualHere is a British Altimeter (Height Indicator) Mk XIIIC Ref 6A 445 as used in RAF aircraft during WWII with a maximum altitude of 30,000ft. The knob rotates the face of the instrument to correct the scale, which is then indexed by the small round window at the 5 o'clock position. Altitude is displayed along the outer scale as the pointer rotates clockwise from 0 at the 6 o'clock position to 16,000 ft at the 5 o'clock position, and then from 16,000 to