Gentex Alpha 900 flying helmet Designer (Organisation) Gentex Corporation Manufacturer Gentex Corporation Date 2021
Oil temperature guage Designer (Organisation) Sangamo Weston Manufacturer Sangamo Weston Date 1950 - 1960 (circa)
Surface mountable guage cover Designer (Person) Unknown Manufacturer Unknown Date 1910 - 1940 (circa)
Military cockpit dimmer switch Designer (Person) Unknown Manufacturer Unknown Date 1930 - 1950 (circa)