Dubilier capacitance electrical engineer's slide rule, designed by Philip R. Coursey and manufactured by John Davis & Son (Derby) Ltd., 1928. Used from new by Mr A.E.Bennett chief engineer at Dubliers, electrical component manufacturers at Park Royal West London.
- Object Number:
overall (estimate): 20 x 300 x 50 mm
- Mrs Adrienne Finch
- Permanent collection
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