Quarter-plate `Cameo' camera used to take 'second phase' of Cottingley Fairies photographs, 1918-1920 Photographs 1915-1920
General Electric CA101 Pilotron triode (McVitie Weston valve collection), 1918 Electronic Components 1918
Healy Pictorial Completion Test I, Edinburgh, Scotland, 1918-1919 Psychology, Psychiatry & Anthropometry 1918-1919