Beechcraft 35 Bonanza Sperry Gyroscope Model F-3 Altitude Gyro 661961 (AP9)

US military Sperry Directional Gyro Indicator WW2

Vintage Sperry Gyroscope Model F-3 Altitude Gyro Part No. 664127

Automatic Pilot Mark 4 MFR Sperry Gyroscope Co. Part Number 648045

Sperry Gyroscope CO., Directional Gyro P/N: 643715 (EB2505151569B) SN- 22543

Sperry Aircraft Directional Control Gyro Type S3A P/N 673447

Sperry Gyroscope CO., Directional Gyro P/N: 643715 (EB2505151569A) SN- 27121

1957 Directional Gyro Indicator by Garwin for Sperry Gyroscope # 23-600 SER #G35