Attached is one of the pictures of a broken lift mechanism, however both need to be replaced. On the item attached the numbers that I can vaguely make out include 11600-1
116523587
11600-3
Paul from SWISCO responded:
September 26, 2017
Thanks for contacting SWISCO.com. I believe I see 5 # 23 on your box, if so, you will need our 24-531 Andersen sash balance box.