Need help identifying this unique balance

Thank you for your patience. We can replace this balance, but it will have to be custom made. Before we can begin, can you tell me the stamp from the original balance? If you aren't sure what it is, if it's too faded, or if there is no letter following a number, we will need the exact weight of the sash.

Finally, one last important note: you need to save the clip shown in the top balance in your third photo. They no longer make these, so you need to reuse it.