Scientific & Projections Limited, London, Gas Pressure R...

Scientific & Projections Limited, London, Gas Pressure Recorder in metal case with glazed apertures, serial no. 171, manufactured under British Patent Number 28459/27, 9" high 18" wide including pipework (with key) ** Eight day mechanical movement turns the recording drum to continuously record gas pressure onto the rotating paper chart ** From the David Read Collection

Estimate:$39.65

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