Why do pocket watches have IIII for 4 oclock?

Pocket watches often use "IIII" instead of "IV" for the 4 o'clock position primarily for aesthetic reasons and to maintain symmetry on the dial. This visual balance creates a more pleasing design, as the use of four I's aligns better with the other Roman numeral placements. Additionally, it enhances readability and has become a traditional characteristic of many timepieces.