ANDERSEN BALANCE?

A handy person from New York says:
HAVE A SASH BALANCER WITH NUMBERS 11600-17 AND L12/1827 8 88 ON THEM, ANY IDEAS WHAT THE REPLACMENT # WOULD BE??
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Bob from SWISCO responded:

Thanks for posting. I believe you might need the 24-L10-1827, which is meant to replace Andersen balances that have the stamp L10-1827. I'd like to see a photo of your old balance's stamp just to be safe. Note that the opposite-handed counterpart for this balance box is the 24-R18-1027.

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