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

Model 8DJ12LAE

as used in large aircraft in both British military and civil service during the 1950's in Reconnaissance/Bomber aircraft such as the Avro Shackleton and English Electric Canberra

Kyushu Q1W Anti-submarine Bomber Tokai aka "Lorna"

Kollsman A26877-10-001

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.