Precision Instrument, by Marconi Company, English, Early 20th Century

Precision Instrument, a heavily constructed disc induction motor driving a 24-hour clock dial and rotating dial graduated 0-100 with outer ring graduated 0-60, through extensive helical gearing. With the seconds/decimal dial viewed through an illuminated glass. In teak case with partially glazed side sections and partially glazed hinged door at rear. With black polished Bakelite knob and ten plug terminals on upper surface of case. Side glass partially damaged and cracked; glass window on rear hinged door missing. Previously catalogued with other Precision Instrument (Inv. Num. 69707).