The spring loaded system appear to be working. Believe this one to be from late 1800s or early 1900s since it does not have the patent date on it.
Antique Hanging Brass Scales
OLD VTG ANTIQUE LANDERS IMPROVED BALANCE No. 2 HANGING SCALE, NEW YORK $12.74 - PicClick
Antique Cast Iron Store Scale Chas. Forschner Sons
Antique Pocket Scale
Forschner Scale for sale
Hanging Brass Scale
Forschner Scale for sale
Vintage Ceiling Hook, Forschner Hand Held Butcher Hanging Scale, Antique Kitchen Scales, Kitchenalia, Rustic Industrial Metal Hooks - Canada
Antique Hanging Scale - Canada
Antique C Forschner's Balance No 2 New York Hanging Scale 24 lb, Black & Brass
Vintage Ceiling Hook, Forschner Hand Held Butcher Hanging Scale, Antique Kitchen Scales, Kitchenalia, Rustic Industrial Metal Hooks - Canada
Antique Kitchen Scale columbia Family Scale