At first I thought they might be "tool chits" used when workers checked out tools but there is no employee number on them!
they do say “Ford, the Universal Car,” on them though which makes them 1914 or later ModelT era.
Ford, the Universal Car: Henry Ford’s Vision in 1914
In 1914, Henry Ford introduced the slogan “Ford, the Universal Car,” a visionary statement that encapsulated his ambition to make cars accessible to the masses. This phrase echoed the spirit of innovation. Thus, foreseeing a future where automobiles would become a ubiquitous part of everyday life.