1/2 x 1-1/4 Constant Force Coil Balance

Constant Force Coil Balance, Open Cam
Available in Single, Double and Triple Coil Springs
Pivot Balance Base has a width of 1-1/4 inches and thickness of 9/16 inches
Coil Springs have a width of 1/2 inch
Coils have numbers stamped in spring that ID Weight
The weight (number) is printed on the end of the spring.
If more than one spring coil, check each coil for different numbers.