NEED A SET OF COUNTER BALANCE

A professional from KENAI ALASKA says:
BEST BUILT WINDOW
23" LONG
OTHER MARKINGS
21 2 8SI ML
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Emily from SWISCO responded:

Hi there!

Thank you for your patience during this busy season. The top fitting on one of your balances is obscured by the tape measure. I'm assuming both of these balances have "winged" top and bottom fittings, like the other balance stamped "21 2".  If I'm mistaken please let me know! 

With this combination of attachments, you could have either an S380-22 or S385-22 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment. You'll also need a 2120 stamp option.

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.
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