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MoHMA Baumanometer, kit bag model Wooden box 12.5"x3.25"x1.75" Lid springs open to reveal ivorine scale to 260 mmHg. Painted black leters, occasional red cross bars. Serial number 18652. Standard Baum constrction of the glass manometer. Sold to George Berbert & Sons, Denver, Colo., Dec 13, 1921. https://www.mohma.org/instruments/category/sphygmomanometer/baumanometer_kit_bag_model_2/