The 5000 serial number range and under had a champagne or gold tinge to the faceplate. Unless you have something silver to compare it to it may be hard to notice.
Upon closer examination, I believe you are right. It doesn't quite match the knobs or my stainless steel coffee mug. I always thought it was silver but 'dull'. But now that I look at it real close, it does have just a hint of gold. It is very, very subtile but it is there. Very cool. I really like this unit and like it a bit more now that it is a little more unusual.
Thanks