26 Year Old Window Glazing

A home owner from Thornton Colorado says:
Insert side is 7/16 to the notch lock.

Window side is 5/8.

Windows are 26 years old and I can't find any branding.
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Paul from SWISCO responded:

We'd like for you to review the specifications of our 55-209 snap-in glazing bead. See if this would make a good alternative for you.

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