Searching for Balnce springs ptg window

Hey Rob. Note the attachments on the ends of your balances. One balance you show has attachments that both have 'wings', or those side tabs that stick out to either side. The other one seems to only have attachments on the top attachment but not the bottom one--however, I suspect the bottom fitting may just be damaged, so please check the other balance from that window to confirm. 

For the balance that has attachments that both have wings, I believe it is either our S380-24 or S385-24. The only difference between these two balances is the depth of the bottom nylon attachment, or its 'heel-to-toe' measurement, so compare both with your old balance to see what matches best. See the diagram below for reference. In either case for a stamp option choose 2350.

Comparison of the S378, S380 and S385 balance shoes.

Hey Rob. Thanks for confirming. It sounds like you need the S380-24 for both windows then, with a stamp option of 2350. Let me know if you have further questions.