18B jr5 cmc

Hey there,

Thanks for posting! There is a chance we can supply the replacements for your window balances, but I'll need to see clear photos of the top and bottom attachments to determine the correct match.

The stamp is useful but it only tells us the weight range a pair of balances can support. Unfortunately, it cannot be used to identify the series you have.

Please let me know if you have any additional questions.