[Lumatic]

It was tough but with several hours of jiggling, pulling and gentle prying I got the 75 double pane glass wing indow sandwich out of the frame in one piece. Note the deteriorated butyl. The dimensions I found making up the window assembly are: aluminum frame channel 3/4", window sandwich 5/8" (2 glass panes 3/16" each + 3/16" space between panes) inside width of U channel 5/8. Note an exact measurement is difficult because of the flexiblility of the U channel and the rounded window edges but my measurements should be close. Actual measurements may be 1/32 to 1/16 larger