What weight category is mine?

Thanks for your post! The stamp in the balance leads me to believe this may be used in a 38lb sash. However, the only way to know the correct sash weight, is to physically weigh the sash.

I'll need to see the top and bottom attachments on the balance to confirm its replacement. The stamp on tells us the weight range the balance may be able to support; unfortunately, it cannot be used to identify the series.