Collection of gyroscopes and related devices, including: a Singer Rate Integrating Gyroscope; a Humphrey Rotatable Directional Gyroscope; a Humphrey Vertical Indicator; an internal gyroscope component; two Vertical Gyros; a North Atlantic Industries Angle Position Indicator 8800; and a Gardner Instruments Glossgard II 75° Glossmeter. In overall very good to fine condition.
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