Dave Sr. from SWISCO responded:
December 23, 2023
Thanks for posting! Take a look at the 55-301 Andersen glazing used for 5/8" thick glass. See if you can remove the existing glazing from the window to see if it matches up. In some cases you might need to replace all four sides of glazing so they all match up to the 55-301. Keep in mind that you could have an earlier style glazing. Let us know if you have further questions. Profile view of 55-301
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