Benjamin Franklin clock dial

About 260 years ago, Benjamin Franklin designed a clock with one hand that told both the hours and minutes. You can read more about it here:
https://founders.archives.gov/documents/Franklin/01-08-02-0060

Franklin's design never caught on, but clocks based on it have been produced in limited quantities from time to time, for example, an electric version by Paragon in the 1960s, a weight-driven version by Thwaites and Reed in the 1970s, and a wrist watch by Meistersinger in 2015. For more info