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Object Detail


A tubular plastic calibration flask with a removable black rubber base with a hole at the center. The flask has a scale from 1 -45 printed on paper and marked on one side of it.
Media/Materials
Production Date
Circa 1960s
Subject Person
Credit Line
This calibration flask was used by prolific Okato inventor Charles W (Charley) Maxwell. Maxwell used it to help test his milk meter prototype that he designed during the 1960s.
Accession No
PA2011.118

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