Stamp option for S795-33

A handy person says:
I'm looking at part S795-33 series 795 block and tackle sash support). Supposedly the sash weight code is stamped on the balance to order the one with the proper spring tension. However, the only thing that is stamped on my old balance is 32-5. How does that number translate into the corresponding letter stamp option? Thank you in advance.
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Tom from SWISCO responded:
The 33-5 is your stamp. Usually the Series 795 has a letter associated with it, but this kind of discrepancy isn't that uncommon. You could possibly need the 33E option, but I recommend weighing your sash on a scale just to confirm.
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