Gyrosyn Induction Compass / Directional Indicator Sperry ID-567/ASN B-52 P-39 Here is a beautifully-presented chrome

Here is a beautifully-presented chrome Letter Opener promotional item from the Standard Steel Propeller Company of Pittsburgh

as used in the RAF's Cold-War-era Handley Page Victor strategic bomber

Model 8DJ12LAE

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

Gyrosyn Induction Compass / Directional Indicator Sperry ID-567/ASN B-52 P-39 Here is a beautifully-presented chromeHere is the Induction Compass (Directional) Indicator for the Sperry Gyrosyn Compass system used in a number of Cold War era US Military aircraft such as the B 52 Stratofortress. See location of the instrument in the photo of a B 52 pilots instrument panel taken at Castle Air Museum. The knob turns the compass card when depressed, otherwise the card indicates direction given the appropriate electrical input from the remotely mounted directional gyro.