Zenith St Blaise Telephonometer with a mechanical movement a...

Zenith St Blaise Telephonometer with a mechanical movement and two electrical connections, case nos. 211-1151, the white dial with a subsidiary seconds dial and centre twelve minutes display, in a nickel plated case with a brown Bakelite base and lever, 2.25" diameter ** From the David Read Collection

Estimate:£50

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