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On clock faces, 4 is Expressed as IIII, not IV

museum.seiko.co.jp

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Re: On clock faces, 4 is Expressed as IIII, not IV

#9
The reason that I heard was that it was easy to mass-engrave a single plate:

VIIIIX

For each clock, you make 4 of these, and split each block into numbers the following way:

V IIII I X

VI III IX (mirror the IX for 11)

VII II IX

VIII IIX

This lets you mass produce watch numbers with a minimum of wasted material.

Re: On clock faces, 4 is Expressed as IIII, not IV

#10
I wonder how much Roman numerals are even taught any longer. Maybe 5 years ago now I was traveling with a friend who went to a solid US suburban high school outside of a major city. Younger than me but certainly not young. And she asked me what a date written in Roman numerals was in the numbering system we normally use. I was somewhat floored.

Thinking about it though. It sort of is cultural/historical trivia. How many hours do you spend in school drilling how Roman numerals are constructed rather than teaching something else. I suppose it's nice enough for those who encounter them when traveling. But pretty far on the not-essential end of the axis.

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