Timepiece The Adult Film Why Does The Roman Numeral 4 Appear As IIII And Not IV On A Traditional Timepiece (clock Or Watch) ?

Why does the Roman numeral 4 appear as IIII and not IV on a traditional timepiece (clock or watch) ? - timepiece the adult film

In the face of a clock, 4 Traditionally, the Roman numeral IIII rather than IV If this tradition?