National Geographic : 1978 Aug
d you want a window? design. rl-clad wood core, optional ag glass and a snug-fitting design -e weathertight than ition standards. charm and character. eauty of interior wood trim that can painted to complement any decor. Easy open, easy close. Perma-Shield Casement Windows crank open smoothly to scoop in passing breezes. And just as easily, they close up tightly. SInsulating glass. Double-pane insulating glass provides a major part of the fuel saving benefits of single-pane glass with storm windows. And only half the glass cleaning chores. Inside comfort. Andersen close-fitting tolerances and rigid vinyl weatherstripping help seal out drafts and dust, help save on heating and cooling bills.