Standard type solar dial with electric motor

Standard type solar dial with electric motor and switch to

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Standard type solar dial with electric motor and switch to
Science Museum Group
© The Board of Trustees of the Science Museum

Standard type solar dial with electric motor and switch to illustrate use of dial in street lighting

Details

Category:
Time Measurement
Object Number:
1932-475
type:
solar dial
credit:
Venner Time Switches Ltd.