Photographic slide of a man testing screw jacks at a Lear, Incorporated facility, Grand Rapids, Michigan, September 1954. A small chalkboard in the scene reads: "Screwjack testing."Inscription on slide: "Lear. Grand Rapids. 9-54."
Photographic slide of a man using a Bechler machine tool at a Lear, Incorporated facility, Grand Rapids, Michigan, September 1954. A small chalkboard in the scene reads: "Bechler Automatic."Inscription on slide: "Lear. Grand Rapids. 9-54."
Photograph of a man using a Learadio portable marker transmitter in an open field, circa 1931-1939.Inscription: "First completely portable outer or inner marker transmitter for radio compass [illegible]."
Photograph of a man working on the nose section of a SAAC-23 mockup, circa 1961.Stamped on verso: "Rohcopie / Hans Entzeroth Fotograf / Zurich Bederstrasse 119."