Hello!
I am hoping to replace the block and tackle hardware for a sash window that looks like it hasn't worked right in a long time. One of the block and tackle balances is missing in fact. and the mounts in the window frame look painted over.
The one balance I do have measures 22 inches for the channel. the markings are included in the photos, "21 5 26# AK CALDWELL"
I have more photos than this form will allow me to upload. If you have a place I can put them, I'm happy to send them along.
Please let me know if you require anything further.
Thank you for your help!
-Marcos
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Emily from SWISCO responded:
July 29, 2022
Hi, Marcos. Your balance looks like either our S380-22 or S385-22, depending on the depth of the bottom fitting. The Series 380 has a 1" deep fitting and the Series 385 has a 1-3/32" deep fitting. Measure as shown in the image below to determine the best match. You will also need the 2150 strength option, based on your 21 5 stamp. 
Comparison of the S380 and S385 balance shoes.
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