Code:
sansserif.plain=Helvetica_LT_65_Medium.ttf
sansserif.bold=Helvetica_LT_75_Bold.ttf
sansserif.italic=Helvetica_LT_66_Medium_Italic.ttf
sansserif.bolditalic=Helvetica_LT_76_Bold_Italic.ttf
Code:
<alias>
<family>Helvetica Neue LT</family>
<family>Kindle Symbol</family>
<family>HeiseiMaruGoth_JIS0213_E</family>
<family>HangulGothicMTC-Medium_E</family>
<family>MHeiGB18030C-Medium_E</family>
<family>MHeiC-Medium-Big5HKSCS_E</family>
<family>Code2000</family>
<default>
<family>sans-serif</family>
</default>
</alias>
It is Helvetica Neue LT
. (The version bundled with the 3.x fw may have some tweaked outlines/custom TT hinting instructions though).