this balance measures 17" long x 1/2" wide x 10/16 deep. The markings on it are "B.S.I. 1610". I need the whole assembly with the plastic pieces at top and bottom. the pulleys, stings, and spring.
Paul from SWISCO responded:
February 16, 2017
Take a look at our S390-17 channel balance, this may be what you want.