There were no markings

Thanks for posting. I'm sure we can help with these balances, but we need more information to confirm exactly what you need. First, is there a stamp code anywhere on the balance? If so, can you show us? Secondly, please confirm if the bottom nylon shore more closely matches the 15-005, which is 1" deep, or the 15-029, which is 7/8" deep. The depth can be thought of as the heel-to-toe measurement. If your balance uses the 15-005 shoe, then you can use our S380-30. If it's 7/8" deep, however, then you need balances that use the 15-029; none of our stock balances have this fitting, but we can custom build them for you without issue. Just let me know.