I worked selling watches for a time in my life and we were instructed that every watch on display had to be set and stopped at 10:10. Looking that up it seems to not have been specific to just the company I worked for.[1] So, counter-intuitively, a store selling clocks at the mall might not have the time displayed either. :)
[1] https://www.frontiersin.org/journals/psychology/articles/10....