Broken window block and tackle with coil spring. pat. 5.737.877

Thanks for posting. These old block & tackle rod balances aren't made anymore, but they can be replaced by one of our tilt window Channel Balances. To know which though, I need to see the attachment at the bottom of the balance. It's missing in these photos. Can you remove the undamaged balance so we can view the bottom attachment? Many thanks.

Ah, perfect. Like Bob said, these aren't made anymore, but your particular style can be replaced by our Series 795. The process is a bit involved, though, so we highly recommend watching the tutorial video below. This should tell you everything you need.

As the video that Tom posted states, you simply want to measure the length from the bottom of the T-Lock attachment, all the way to the end of the plastic tip where the clip retracts. Crossbow balances come at inch-and-a-half intervals, whereas the Series 795 come at an even inch. You will round down to account for the difference. For example a 22.5" crossbow balance rounds down to 22" Series 795 Channel Balance. See the video for more details.