This is the first model of the Union Pacific Heritage Fleet that I purchased. This is an Athearn UP 844. I figured I had to have one since they run regularly from Cheyenne to Denver and regions beyond.

David my UP844 is not brass like yours and it certainly does not have a Tsunami sound decoder but it runs decent and does not sound nearly as bad as the UP3985 that I have. I am not a steam lover but it is really neat when the red gyralite comes on.