4502 is called a night guard and represents the old style watchmen who used to patrol the streets of towns after the watch had been set. From 1973 to 2010 we lived near Ripon in the UK which still has the practice of the watch being set by the Hornblower. He sets the watch by blowing his horn four times in the market square - once towards each corner - and then outside the Mayor's house. This has been done every night since the early 800s.