Don't rely on what's stamped on the acrylic to identify a portlight model. Instead, frame construction gives a more reliable guide.

A useful guide to the use of metals in the marine environment written by Moray MacPhail and previously published in Watercraft magazine

Excellent article authored by Colin Shead discussing how he reinstalled windows on his Moody 28 after refurbishment by Eagle Boat Windows

Replacing the panes in some Lewmar old-standard opening ports