New Style - Constant Force Balance System used by several Companies including Hurd, Capitol, Metal Industries, Coronet and others.
Each Coil spring has a number embossed on the side that determines the strength of the balance.
They may have one or more coils and the coils may have different numbers on each coil if used in Doubles
Plastic Balance shoe: 1-1/4 Wide and 17/32 thick. (shade over 1/2 inch thick)
Overall Length: 2-7/8 inches prox. depending on coil size
Number of Coils: One - If you have two coils, your in wrong product category
Coil Diameter: 1/2 inch wide Coil spring
Number on Coil: Number is embossed on the side of spring.
( this determines the strength of the balance - Select from List below)
NOTE:
Sold Each - Best if Replaced in Pairs, Should not mix old with new
PLEASE Check all Dimensions
Choose Coil Weight from List below
Number Stamped on Single Coil Spring
5 or 540
6 or 640
7 or 740
8 or 840
832

Note: For Other combinations - Contact office