Hello,
It looks like you may have balances similar to our S770 that attaches to the top of the window jamb with a screw but yours appears to use the 62-105 hook, which often attaches to a pivot shoe like the 15-105.
I would recommend starting by confirming that the specifications below match up to yours. Also, we'll need to confirm the exact length of your metal channel, which appears to be 24", as well as the weight of your sash since your balance stamp does not match any of our strength options. Lastly, we'll need to know the number of Please note that this would need to be a custom order, so it is important to confirm all of the details before moving forward. Thank you!
The pulley system in the balance shown in your photos is broken but an undamaged assembly should resemble ours. If not, we would need to see photos of an intact pulley system. To clarify, the hook would replace the terminal clip attached to the pulley cord shown in our photo, which is why it needs to be a custom order.
Also, the sash is the piece of glass and frame in the window that you raise and lower, which is supported by the channel balances. That sounds like the part that you weighed but it is important to confirm the exact weight since the balances need to be calibrated correctly. Keep in mind that since the balances need to be specially made, they would not be able to be returned for a refund.
Your pulley system looks the same as other balances that we have offered the S770 with the 62-105 hook to replace. You can view one example
Your pivot shoe resembles the 15-105 shown below, which is commonly used with this type of balance assembly.
As for your sash weight, we have two strength options for the S770-24 that will support 22 pounds, 24C and 24D as shown below. Just let us know which option you'd like to go with and we'll be ready to send over a price quote for two replacement balances.
24C: 17 to 22 lbs
24D: 22 to 25 lbs
We're happy to help! We just sent over an order link and price quote for you to review. Keep in mind that the link is only for the balances but you can add the 15-105 pivot shoes to your order directly from our website if needed. Take a look and let us know if you need anything else.