REPLACEMENT
Thanks for your photos. Based on what I see here, you have either our Series 380 or Series 385, depending on the depth of the bottom shoe. That's the only difference between them. I recommend measuring your shoe and referring to our dimensions to confirm the best match.
For the clip, see our 16-002.
You didn't give any dimensions, so there is no way for me to make that judgement. The diagram below may be helpful to you, this shows you exactly what you need to measure.
THANK YOU
Thanks for confirming. That means your shoe is closer to our 15-029, which means this has to be custom made. We can do that for you but we can only supply 2 balances at minimum because it's a custom order. I know you said you only wanted 1 so I hope that's okay.
With that in mind I will need some additional details: please tell me the length of the metal channel and the number printed on it. That will allow me to pick the best size and spring calibration for your window. I will then email you a purchase link and price quote that you can use to place an order on our site.