the reason why some roman clocks still use number four as IIII instead of IV

The use of "IIII" instead of "IV" on some Roman clocks for the number four is a historical practice and not the standard representation in Roman numerals. Here are a few reasons why you might still see "IIII" on certain Roman clocks or other historical displays:

1. Tradition: Some clockmakers may have continued the use of "IIII" as a nod to tradition or historical precedent, especially if they were repairing or maintaining very old clocks.

2. Aesthetics: In some cases, the symmetry of "IIII" might be preferred visually over the "IV" when the numerals are arranged around a clock face, as it can provide a more balanced appearance.

3. Error: It's possible that some clockmakers made an error or were not aware of the correct Roman numeral usage, leading to the use of "IIII" instead of "IV."

4. Legal or Practical Reasons: On certain public clocks, especially in jurisdictions with a history of using "IIII," there might be legal or practical reasons for maintaining the status quo, even if it's not technically correct.

5. Mimicry of Handwriting: In some historical contexts, the use of "IIII" for four was seen as more closely resembling how Roman numerals might have been written by hand, particularly in cursive forms.

6. Historical Precedent: In the past, the use of "IIII" was more common, and some clocks may have been made or repaired in a way that preserved this older form.

Despite these reasons, "IV" is the standard and correct way to represent the number four in Roman numerals. The use of "IIII" is more of an exception and can be seen as a quirk or an anomaly rather than a rule.