Need Help Finding Correct Replacement

A contractor from 19020 says:

You guys are awesome. I order all of the time. Could you please help me identify this Anderson balance?

Thank you.
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Tom from SWISCO responded:


It's tough to make out but it looks like your balance stamp may read L10/ 1827. If so, you'll need to use the   24-L10-1827 Andersen sash balance.  Also, note that the opposite-handed version would be the 24-R18-1027 . Take a look and see what you think. Thank you. 

How to replace an Andersen Window Balance
How to replace an Andersen Window Balance
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