2630 and 2640

Thanks for your photos. Based on what I see here, you have either our S380-27 or S385-27, 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.

One thing to note is that if these balances are out of the same window then they really ought to have the same stamp. If that's the case then you should weigh your sash on a scale and refer to the weight chart for the balance in question in order to pick the proper stamp option.

If these are off of two different windows then you can ignore that advice, they're probably fine.

Comparison of the S380 and S385 balance shoes.