General Electric CA101 Pilotron triode (McVitie Weston valve collection), 1918 Electronic Components 1918
National Panasonic Super Sensitive 10 Transistor R-307, by Panasonic, Japan, c.1963 Radio Communication c.1963
Infant Identification Name-On Beads, New York, United States, 1920-1930 Nursing & Hospital Furnishings 1920-1930