Caldwell channel balance
A quick learner from Salem,Oregon says:
October 6, 2016
Part marking 13"135jo.. what replacement part do I need?
Tom from SWISCO responded:
October 10, 2016
I'm afraid that number doesn't correspond to anything in our inventory. The stamp only tells us how strong the spring is, and the strength of the metal channel. On that point, I would double check your measurement. Based on your stamp, the metal channel should be 14" long, not 13".
As for the Series, the only way to find that is by comparing physical details. You won't find any numbers on your window or balance that will tell you what you need. I recommend that you look at our Channel Balance Home Page and follow the steps in order to find the Series that best matches what you have.