Ancient greek roman characters

Ancient greek roman characters

I have extracted the Greek text from pdf that give me the HTML output as :
μεταξ˜ where the last character is in the old
greek font. The interesting point here is that if i view it in the MS-word
and select the last character to the font as "OldGreekRoman" than that
character is now viewable as to original form.
That is baffling me.Please help.
I need the original unicode of that last character