TitleComparatorAlternative TitlePhysics Museum Collection Unique IDUA-00002767Alternate IDH.PM.2006.112FormatInstrumentDescription
Electronic comparator (timing for Shortt clock) and speaker, housed in metal (aluminium) siliver box. Two toggle switches (on/off) and (fast/slow) and a dial (volume), also LED display for timing seconds, all on the front face.
