Not that I have micrometer-click eyeballs, but there was an old WPA (Works Projects Administration) outhouse on my farm.
Poking around in there when we first moved into the property, the studs somehow looked "funny." Couldn't put my finger on it, but after a while I realized the studs were actual, honest-to-gawd, full 2 whole inches by 4 full whole inches. So said my good ole Stanley tape measure.
Told Wife1 about it. She wasn't as excited about this amazing discovery as I was.
A modicum of research indicates that what with seasoning shrinkage, sawmill saw kerf widths, sanding for smoothness, etc, etc, lumber sizes weren't really standardized until 1969 AD.
Maybe that suit should have been filed before then.
Terry