An engraving depicting Martin's electromechanical clock, showing the pendulum and electromagnetic drive which replaced a weight or mainspring. Dated 20th century

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Details

Creative#:

TOP25302413

Source:

達志影像

Authorization Type:

RM

Release Information:

須由TPG 完整授權

Model Release:

No

Property Release:

No

Right to Privacy:

No

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Same folder images