Old Channel Balancers Stamped 29 6 KW CMC 7

Thanks for reaching out! It looks like you have either our S380-30 or our S385-30 with a 2960 stamp. Like your balance, these balances have a winged top and a winged bottom.

To confirm which series you have, you'll need to measure the depth of your bottom shoe. Take a look a the diagram below.

Comparison of the S378, S380 and S385 balance shoes.