Bayko box Designer (Person) Plimpton, Charles Manufacturer Plimpton Engineering Company Date 1934 - 1967 (circa)
Oil temperature guage Designer (Organisation) Sangamo Weston Manufacturer Sangamo Weston Date 1950 - 1960 (circa)
Military cockpit dimmer switch Designer (Person) Unknown Manufacturer Unknown Date 1930 - 1950 (circa)