Anderson Window Balance

A quick learner from Stanhope NJ says:
The existing window balance had the following numbers engraved on them
R12827688
11600-17
Also, Anderson Core was there too
The window glass dimensions are
28 1/2 wide x 24 height Top Sash
28 1/2 Wide x 36 height Bottom Sash
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Casey from SWISCO responded:

Hello,

I would need to see photos of your balance stamp to be sure but the R12827 indicates that you may need the 24-R12-827 Andersen sash balance for your repair. See the 24-L8-1227 for the opposite side. Take a look and thanks for posting!

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