Andersen window balancer
A quick learner from new york says:
May 15, 2014
Do you have a replacement for andersen balancer 11600-2. It the numbers C61 and 6#31 on it. Mnf. date is 5/1981.
Donna from SWISCO responded:
May 16, 2014
Take a look at 24-637 Andersen Balance, this is normally used to replace balances with 6#31 stamped on them.