numbers stamped are only 3 digits (2 numbers-space-1 number) - windows are very heavy
17" 16 3 BSI
24" 23 4 BSI
24" 23 5 BSI
30" 29 6 BSI
researching your great site, I believe the balances to be series 380 and the top sash guide to be 18-015
Please give me your advice so I can place an order. I can try to send more photos if needed but thought this would give an idea. Didn't realize several of the photos I took were accidentally erased.
Thank you. Lou
![IMG_4573 (1)](images/pictures/2023/01/622624.jpg)
![IMG_4587](images/pictures/2023/01/622625.jpg)
![IMG_4588](images/pictures/2023/01/622626.jpg)