This is made by the Torsion Balance Company in New York. The style number is 253 and number 115907. The dimensions are:
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Based on the photographs and information provided, and subject to examination, this is:
A vintage Torsion Balance Scale
made in New York,second quarter 20th Century
4 1/2 kg capacity, with removable plates
7 inches tall by 16 inches long, by 6 inches wide
*represents a fair-market value for auction purposes; retail or asking price may vary.