2330 Window balancer

Thanks for posting. I suspect this is either an S380-24 or S385-24 Channel Balance. The only difference between these two balances is the 'depth' of the bottom nylon shoe, as shown below. Measure your old balance's shoe depth to see what matches best. In either case, for a stamp option choose 2330.

Comparison of the S378, S380 and S385 balance shoes.