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 Scale for sale
Forschner Scale for sale
ANTIQUE HANGING SCALE FORSCHNER CO 30 lb Vtg Primitive Brass Face Tin Tray, NY $97.00 - PicClick
Chas. Forschner & Sons Scale, New York
ANTIQUE HANGING SCALE FORSCHNER CO 30 lb Vtg Primitive Brass Face Tin Tray, NY $97.00 - PicClick
Antique Cast Iron Store Scale Chas. Forschner Sons
Antique Hanging Brass Scales
2701) ANTIQUE TURNBULL'S 24 LB Balance No 2 Fish Scale Brass Front Patent NY $18.18 - PicClick
Antique C Forschner's Balance No 2 New York Hanging Scale 24 lb, Black & Brass
Chas Forschner & Sons Scale
C. Forschner's 25 Lb Hanging Scale - Ruby Lane