Curtiss P-40 Warhawk fighter-bomber assembly plant.
https://diqn32j8nouaz.cloudfront.net...t_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...530#post237376
https://www.homemadetools.net/forum/...736#post182962
https://www.homemadetools.net/forum/...389#post161907
https://www.homemadetools.net/forum/...410#post204681