1919 DuPont chart room.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...m_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...chart_room.jpg
Fullsize image: https://diqn32j8nouaz.cloudfront.net...1_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...hart_room1.jpg
Previously:
https://www.homemadetools.net/forum/...304#post131095
https://www.homemadetools.net/forum/...195#post103566
