do all roman clocks still always write number four as IIII instead of IV

No, not all Roman clocks write the number four as "IIII." The representation of the number four as "IIII" in Roman numerals was a traditional practice in some historical Roman sundials and clocks, but this is not a standard or universal rule for all Roman clocks.

Here are some important points:

1. Standard Roman Numerals: In traditional Roman numerals, the correct representation of the number four is "IV."

2. Historical Exceptions: In certain historical Roman sundials or clocks, "IIII" was used to represent the number four, particularly due to superstitious or religious reasons relating to the god Jupiter.

3. Modern Clocks: Most modern clocks follow the standard Roman numeral system and use "IV" to represent the number four.

4. Design Choices: Some clock designers may choose to use "IIII" for stylistic or historical reasons, but this is not a universal practice.

5. Clock Manufacturers: Major clock manufacturers typically use "IV" for the number four to adhere to standard numeral representations.

In summary, while the use of "IIII" for the number four is interesting from a historical perspective, it is not a norm for all Roman clocks, either past or present. The vast majority of clocks, especially those made in modern times, use "IV" to represent the number four, following the standard rules of Roman numerals.