No. 3 standard air condenser, with case, by Latimer Clark, Muirhead and Co. Ltd. No. 3 standard air condenser, with case, by Latimer Clark, Muirhead and Co. Ltd.
Laboratory Standard Air Condenser, no.701, by H.W. Sullivan, made in April 1921 and modified in October 1933, Range 250-5100 picofarad Laboratory Standard Air Condenser 1921