1
α
Greek alphabetic numeral
Greek Ionic (Milesian) letter-number substitutions for 1–999, including the special symbols for 6, 90 and 900.
Values are added; e.g. 26 = κϛʹ (20 + 6). The right keraia mark ʹ identifies numerals. The three archaic signs ϛ, ϟ and ϡ are essential.