Andersen narrowline parts

A contractor from Ridgewood, New Jersey says:
July 23, 2023

I need replacements for this Andersen window part. It's a I believe a narrowlune installed sometime in the 1980's. This is from the left side looking from the inside. I will also need the right side. Would they be the same part or are rights and lefts different. It is hard to read the numbers. Can you tell me what parts I need.

Thanks

Peter

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Bob from SWISCO responded:
July 23, 2023

Hey Peter. I believe the central part of those numbers reads '9 27'. If so, see our 24-939. This can replace Andersen balances with that stamp code. 
Andersen Sash Balance, 927, 931, 937, 939
Andersen Sash Balance, 927, 931, 937, 939
24-939
$54.20
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