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twig field
Jul 09,2025
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Hahl Automatic Clock Co. Chicago, Pneumatic slave clock.

Anonymous (not verified)
22 October 2024
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Runs by air pumped thru lines from the master clock. You can see the doctor's blood pressure bulb someone attached to watch the hands move as they squeezed the bulb. How ingenious. The red oak case is exceptionally good looking and the dial is near perfect. What a shame it does not have a Howard movement. If you collect the unusual, this is for you.

Clock image
Price Type
auction
Manufacturer
Hahl Automatic Clock Co
Credit
Horton's Antique Clocks
Creditor url
http://www.hortonsantiqueclocks.com
Text search
Hahl Automatic Clock Co. Chicago, Pneumatic slave clock. Runs by air pumped thru lines from the master clock. You can see the doctor's blood pressure bulb someone attached to watch the hands move as they squeezed the bulb. How ingenious. The red oak case is exceptionally good looking and the dial is near perfect. What a shame it does not have a Howard movement. If you collect the unusual, this is for you.

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