Roman numerals, a numeral system originating from ancient Rome, are frequently used in watchmaking to denote the hours on a watch dial. This classical numbering system employs combinations of letters from the Latin alphabet: I, V, X, L, C, D, and M, representing values of 1, 5, 10, 50, 100, 500, and 1,000, respectively. In horology, Roman numerals add an element of timeless elegance and sophistication to watch designs, often seen on luxury and traditional timepieces. The use of Roman numerals on watch dials can enhance the aesthetic appeal, providing a vintage or classic look that appeals to collectors and enthusiasts alike. Typically, the numerals I through XII are used to mark the hours, with IIII often replacing IV for the number four, a practice rooted in historical and aesthetic preferences. This choice maintains visual balance and symmetry on the dial, contributing to the overall harmony of the watch face. Roman numerals are not only a nod to historical timekeeping methods but also serve as a stylistic choice that distinguishes certain watches, making them stand out in a market where digital and Arabic numeral displays are prevalent. Their continued use underscores the blend of tradition and craftsmanship in watchmaking.