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Paul R. Saunders and Thomlin in lab
Magnetic relay for electronic switching
Army air force bubble sextant
Aviation altimeter
Security stopwatch
Wrico lettering set
Wrico lettering set
Wrico lettering set
Wrico lettering set
Keuffel and Esser Le Roy lettering set
Tower drafting set
Theodore von Karman
Morris Dam reservoir, San Gabriel Mountains.