Replacement Andersen Sash Balance

A quick learner from St Louis says:
Need to find replacements for Anderson sash balances.
Markings (Bottom of balance):
- Top Right: 11600R-2
- Bottom Right: 1031 S32 12/4

Markings (Top of Balance):
- 11600B-3
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Bob from SWISCO responded:

See our 24-1033. This is meant to replace Andersen balances that include the stamp 1031. 

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