
1) Markings on some watches 2) MMXVI components
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https://www.crosswordclues.com/clue/roman-numerals

Roman numerals, the numeric system used in ancient Rome, employs combinations of letters from the Latin alphabet to signify values. The numbers 1 to 10 can be expressed in Roman numerals as follows: The Roman numeral system is a cousin of Etruscan numerals. Use of Roman numerals continued after the decline of the Roman Empire. From the 14th centur...
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http://en.wikipedia.org/wiki/Roman_numerals

A number system in which each symbol represents a fixed value regardless of its position; this differs from the place-value system of Arabic numerals. The earliest form of the Roman system was, however, decimal. In this primitive version a series of I's represented any number from 1 to 9, and a new ...
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http://www.daviddarling.info/encyclopedia/R/Roman_numerals.html

A system of writing numbers in which the characters I, V, X, L, C, D, and M have the value of 1, 5, 10, 50, 100, 500, and 1000, respectively. Lesser numbers in prefix positions indicate subtraction. For example MCMLXIV is 1964 in decimal, because CM is 900, LX is 60, and IV is 4. Contrast with Arabic numerals, Chinese numerals, and Indic numerals.
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http://www.ibm.com/developerworks/library/glossaries/unicode.html

Roman NumeralDecimal Equivalent1510501005001000500010000500001000005000001000000ExamplesI = 1II = 2III = 3IV = 4V = 5VI = 6VII = 7VIII = 8IX = 9X = 10XI = 11XII = 12XIII = 13XIV = 14XV = 15XVI = 16XVII = 17XVIII = 18XIX = 19XX = 20XLIX = 49XCIX = 99
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https://www.encyclo.co.uk/local/20687

Ancient European number system using symbols different from Arabic numerals (the ordinary numbers 1, 2, 3, 4, 5, and so on). The seven key symbols in Roman numerals, as represented today, are I (1), V (5), X (10), L (50), C (100), D (500), and M (1,000). There is no zero, and therefore no place-value as is fundamental to the Arabic system. The ...
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https://www.encyclo.co.uk/local/21221
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