Tom from SWISCO responded:
May 27, 2015
That's normal, though the stamp should have a couple more numbers to it. Typically, the first two digits of the stamp will be one increment less than the total length of the metal channel. Do you know what Series you have? Does your stamp have more numbers to it? I'd be happy to make a recommendation, if you need one.
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Tom from SWISCO responded:
May 28, 2015
Ah, I see. Yes, you'll need to remove the plastic jamb liner to swap out balances. See the video below for more help.
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