number stamped, 16CZ

A handy person from NC says:
I have a channel balance that has the number 16CZ stamped on it it is 17" long and has the same hardware as S800-17. is this the same as the 16C?
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Donna from SWISCO responded:
It could be 16C, to check remove the window sash and place it on a scale.
SWISCO product S800-17 with stamp option 16C will carry a window sash weight range of 12 through 18 pounds.
This information is based on 2 balances per sash. Balances are designed assuming friction in the jamb weather-strip will carry a portion of the sash weight. Suggested sash weights are approximate.
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