Only marking on balance is 28 4 CALDWELL. EM
A home owner from Ocala, Florida says:
February 18, 2016
Spoke to Tim yesterday. Returning 2 balances I ordered previously, wrong length and the ends have ears ( tabs ). The originals don't . My originals are 29 inches long. Hope the pictures are helpful to identify the old balances so I can order the correct replacements.
Paul from SWISCO responded:
February 19, 2016
Please see our S390-29 channel balance. I think this may be the one you want.