'Paragon' reusable rubber condom, London, England, 1948-1950 Obstetrics, Gynaecology & Contraception 1948-1950
Seven white ceramic fermentation vessel from apparatus used in experimental work with penicillin Biotechnology 1939-1949
Hollerith 45 column horizontal electrical sorting machine, 1920-1930 Computing & Data Processing 1920-1930