do modern roman clocks still use number four as IIII instead of IV

No, modern Roman clocks do not use "IIII" for the number four; they use the correct form "IV". The use of "IV" is based on the standard rules and historical conventions of Roman numerals:

1. Subtractive Principle: In Roman numerals, when a smaller numeral appears before a larger one, it is subtracted from the larger numeral. For example, "IV" represents 4 (5 - 1).

2. Standardization: "IV" is the universally accepted representation for the number four in Roman numerals, including on Roman clocks.

3. Readability: Using "IV" ensures consistency and clarity, making it easier for people to read and understand the time displayed on a clock face.

4. Historical Precedent: The use of "IV" for the number four has been followed for centuries in various contexts, including clocks and other timekeeping devices.

5. Cultural Consistency: Using "IV" maintains cultural consistency with the traditional usage of Roman numerals and avoids confusion.

While it's possible that some modern devices or artworks might use "IIII" for stylistic or artistic reasons, it would not be considered a correct representation of the number four in the context of Roman numerals or timekeeping. The standard and expected form is "IV".