Abrams P-1 Explorer, made just before WW2, put on hold during the war, and obsolete after the war. Created for aerial photography, the windows were the first to be formed on a compound curve in history.

http://nhungdoicanh.blogspot.com/2011/02/abrams-p-1-explorer.html
https://alchetron.com/Abrams-P-1-Explorer#-