Bob from SWISCO responded:
May 26, 2021
Greetings. I believe this is either our 15-251 Single Coil Support, or the 15-252 Dual Coil Support. It depends on how many coils each side of the window used, and while it appears to be two, its very possible the single coil unspooled when it broke, to give the appearance of two. This balance system uses our Series 160 Coil Balances. It may be best to weigh the window sash. Give me that exact weight, and I can tell you what spring weights you need. |