Emmentaler unicode value

[Pierre Perol-Schneider]

Hi,
In the Emmentaler font, the "G.clef" Unicode value is: U+e17b.
However, after Unicode hexadecimal values being entered, it shows another
glyph:

\version "2.19.83"

\markuplist {
  \line {
    \italic "Unicode" \typewriter "U+e17b" \italic "shows" \typewriter
"clefs.tenorG_change:"
    \override #'(font-name . "emmentaler-20") \char ##xe17b
  }
  \line {
    \italic "Unicode" \typewriter "U+e176" \italic "shows" \typewriter
"clefs.G:"
    \override #'(font-name . "emmentaler-20") \char ##xe176
  }
}

Any reason why?
TIA, Cheers,
Pierre