Alside series 0901 double hung
Hi there!
Thanks for reaching out to us. It looks like your photos didn't come through. Can you re-upload them here for us?
Thanks for reaching out to us! Your pivot shoe appears to match the 15-177. We don't have an exact match for the pivot bar but take a look at the 26-030, 26-226, and 26-352. Review the specifications and see if one of them matches what you're searching for.
When it comes to coil balance assemblies, you can replace what's broken and reuse the old parts if they're in good shape. So if the coil springs aren't broken, you can reuse them with the 15-177 pivot shoe as long as they screw to the side of the shoe like ours.
If you'd like to replace the coil springs, you can use two S152-5 5-pound springs on each side of the window, for a total of 20 pounds of overall support.
Please let me know if you have any questions!