Need anderson sash balances 2 pair

A quick learner from Salt lake city says:

From Charles 

Their are 2 numbers on the 61/2 x 3 box. E79. 9

11600-17

The unit size is 32x65 with the upper window 32x27 and the upper 32x39 1/2

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Paul from SWISCO responded:

Hello!

It sounds like you may be describing a cottage window where the top sash is smaller than the bottom sash. Given the dimensions, you may need the 24-L9-1327 on one side and the 24-R13-927 on the other side. Photos of all the stamps on the balance would allow us to confirm if these are the parts needed for your repair. 

A quick learner from Salt lake city says:
Thanks for the reply

The second device had the same numbers as l first described. If those two devices
Are still the correct ones I'm then ready to order.

Thanks,
Charles


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Paul from SWISCO responded:

Thanks for getting back to me, Charles. I believe I see 9#31 stamped on your balance which leads me to recommend our 24-939 instead. This is designed to replace balances with the 9#31 stamp. 

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