The Reindeer tauntaun mount seen by players on the SWTOR PTS didn’t make it to the live servers.
What happened to the Christmas Tauntaun? | 12.19.2013, 09:06 PM
Item prototypes are among the types of things you can see on the Public Test Server. Like all things on the PTS, they are subject to change and in some cases to not make it into the game at all. This happens to be one of those cases. I apologize for any confusion this may have caused.