Pennco Replacement Window Balance (Unique 23-E-50 stamping)

Thanks for posting. I think we can help replace this balance for you, but it will likely have to be a custom order. First, can we see how the balance installs at the top? Can you also show us any bottom attachment, or shoe? We will also need the weight of your window sash as well. Finally, how many balances do you need? We'll work with you from there. Many thanks.

Perfect, that's all we need to know. So, we'll be setting you up with an S770-24 balance with a 62-105 hook attached to the end. Does that look good to you? This should function the same way; the 62-105 hook is fully compatible with your pivot shoe. 

We'll also be using the 24C stamp for this balance, which carries 17 through 22 pounds.

Lastly, I agree that you should replace both balances. That way the new hardware will last longer. I'll email you an order link and price quote for 2 right now.

Oh, and before I forget, regarding how your balance is held in place: it really shouldn't depend on just that metal post. You should consider drilling a hole in your window track at the top to support the new balance.