Replacing my channel balance

Thanks for writing in. I'm not sure if I see any reason to think this isn't a Series 770. The length of the spring doesn't really matter; what matters is that our spring is on the top and our pulley is in the bottom. That is the case with your balance as well. Does anything else differ, such as the style of the clip at the end of the cord? If it's different, let us see a picture. Otherwise I think this is a Series 770. Confirm that the metal channel is 28" long; if so, its a S770-28. The stamp code of 2830 is a little weird for this type of balance; but to know what stamp option to select, weigh your window sash. You can then match that precise weight with one of the weight ranges listed with each stamp option on the product page.  

Ah, that clip is not the same as what's on our Series 770. While the S770-29 would act as a base, the hook at the end is more like our 62-105.

We can make this for you but it would have to be a custom order since we need to tie the clip on there. If that sounds good to you, let me know how many you need and I can email you an order link and price quote for the requested quantity. For a sash weighing 25 pounds, we'd go with the 29D option. If you wanted to be 100% sure, you could get the exact sash weight.

No, don't order the pivot shoe until I see your old one. If your balance uses the 62-105 balance hook, then the 15-129 shoe is not the correct one. We will need to identify the correct pivot shoe. If you could show it to us, removed from the window, that would be of great help.

Thanks for your patience while we looked into this. This is our 15-105; I'm afraid we don't have any other shoe that will work in place of this. Your only option will be a custom made balance. This is an older style system that just isn't made anymore. 

With that in mind, we just need to know how many balances you need. We have all the other details to get started.

Sure thing, I'll have my colleague Tom shoot over an order link and price quote for 2 right now.