This is the top bracket for Weathervane double hung wood windows.
Since it is no longer manufactured, I decided to reproduce it. The material is nylon (the same as the original). I made the originals at home on my own 3d printer and they are working great on my and a neighbors windows.
You can either order these directly or instead, just contact me using the link at right and I will come and fix your windows myself complete with all the parts necessary. I'll also fix the inadequate mounting for the spring mounts that is the cause of many of the failures.
For the do it yourselfers, the rest of the parts are still available and can be purchased on swisco.com
Additional parts from swisco that you'll need:
channel length: to measure (typical is 25 inches)
channel_stamp: 2430
channel balance top: 19-038
channel balance bottom: 15-193
* White is the default. Black should add just a touch more u.v. resistance. The smooth polished is strictly for asthetics (not much) and does not add anything to the functionality.