Searching for e239p27775 sash balance
A quick learner says:
June 30, 2012
old anderson window product number is E239P27775
Paul from SWISCO responded:
July 2, 2012
Thanks for posting! I can see by your picture that the most prominent stamp is 9 27. In that case, I recommend you look at our 24-939 Andersen sash balance, which can be used to replace boxes with the stamp 927.