Anderson sash balance C266#312-86

A home owner from NJ says:
I am looking for a replacement for my Anderson sash balances with the following # C266(then there is a vertical line with two hashes)312-86.

They are for a double hung window from the early 80s, narrowline I believe. Each sash of the window has an other dimension of 24"wide by 28"high and glass 20" x 24". They look the same as the ones you carry however the logo and Anderson name are on the right side and the # is above the name not on the side in the vertical position.

Thanks, Paul
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Paul from SWISCO responded:
Thanks for contacting us! Have you seen our 24-637 Andersen Sash Balance? This can be used to replace balance boxes with the stamp 6#31.
A quick learner says:
Thanks Paul, I will order a pair.
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