Sash balances

A quick learner from Placerville CA says:
October 15, 2020
Hi ? I have four Andersen sash balances (two windows) that I need identified, and two more balances to (one) different window.

First four balances-

For parts #11600-17, I have stamped on them R13 927 1-88, and on the tangs each is stamped R29 2 89

Other 2 balances

Parts numbers 11600-17, sashs stamped 927, and on tangs is stamped R28 1288

Could you tell me what (4) and (2) balances I need for all 3 windows?-
thx -Matt
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Bob from SWISCO responded:
October 20, 2020

Hey Matt. For the Andersen balances stamped R13 927, you'll need our 24-R13-927. Note that this is a right-handed balance; for the left side of the window, you will need the 24-L9-1327. 

For the balance boxes that are simply stamped 927, you can use the 23-939. These are non-handed balances, meaning they will work on both sides of the sash. Let me know if you have further questions. 
Andersen Sash Balance, 927, 931, 937, 939
Andersen Sash Balance, 927, 931, 937, 939
24-939
$54.20
Andersen Sash Balance, R13 927
Andersen Sash Balance, R13 927
24-R13-927
$54.20
Andersen Sash Balance, L9 1327
Andersen Sash Balance, L9 1327
24-L9-1327
$54.20
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