ψ΄
Nonstandard in modern Greek, which typically employs the capital letters. Byzantine Greek employed lower-case letters, but used macrons rather than the present-day numeral mark.The Greek numbers from 1 to 999 are properly marked using the Greek numeral signκεραία(keraía) (ʹ ), though they may also be found with thetonos (΄ ) orapostrophe (' ).