Identify this balance please

Thanks for your photos. Based on what I see here, you have either our S351-27 or S390-27, 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.

As for the stamp, yours is very peculiar. I don't believe 2616 is something I've ever seen on this series before. Please give us a little time to look into that and I'll get back to you ASAP. For now, please just verify which of those two Series you have so that we have that information in hand when we need it.

Comparison of the S351 and S390 balance shoes.

Thanks again for your patience. I'm sorry to say that we weren't able to find a record of what that 2616 stamp might represent. It really is a weird one.

With that in mind, would it be possible for you to get the exact weight of your sash? The plan now is to basically start from scratch and figure out how these springs need to be calibrated. Ideally our S390-27 has a standard stamp option that can match that weight and do the job for you. Knowing your exact sash weight will let me verify.