Wrist watches with mixed numerals

 

— dials that combine two types of numbers in the markup at the same time — both Arabic (standard modern numbers like 1,2,3, etc.), and Roman (based on a combination of the letters I, V and X). Often such numbers are supplemented with labels.

In general, this is a rather rare and specific option. Most watches with this feature are models with a world time function (see "Functions") and two scales, one of which is marked with Roman numerals, the other with Arabic. However, there are other options — for example, different types of numbers within the same main dial.