Channel lift, differences in shoes?

Thanks for posting! The main difference between these two shoes can be found in their depths. Please take a look at our 15-004 and 15-005 channel balance shoes, and note this dimension. As you can see, they are 1-3/32" deep and 1" deep, respectively. Which one more closely matches your own bottom attachment?

In order to know what channel balance you need, I first need to know what attachments it has on either end. This will determine its Series. The stamps you've posted are simply indicative of the weight of your balances. They are not serial numbers.

As you can see, the biggest difference between the Series 380 and Series 385 is in the bottom shoes--the 15-004 and 15-004, respectively. Please compare their dimensions to your own bottom shoe and let me know which one you have.