Old wood window "spiral" type balances

Question

I am trying to find these old "spiral" style balances for 1950's wood windows.
They do not function like a spiral balance though. The square end push's in about ½" and you can wind it up and it will unwind.
It does not pull out.
Can you please let me know if you have ever seen something like this?

Thank you,
Jason

Paul · Accepted Answer

Many thanks for posting. Your balance system is no longer used or available. However we have found our Series 500 Spiral Balance can work as a replacement. Below are generic directions for installing the Series 500. Let us know if you have further questions.

First drop the Series 500-23 balance behind the sash and screw it at the top with the 33-016 screw. Raise the sash and have someone hold it up while you place the 17-012 bracket under the sash and have it corral the spiral. Screw the bracket to the sash. Continue holding up the sash while you bring the spiral up to the bracket. Now turn the spiral clockwise with the 75-005 tool about four turns. Then lock the bow tie at the end of the spiral to the 17-012 bracket. Do the same on the other side and try the sash. If it creeps down, give the spiral another turn.