This is a copy of a PTC horse. The chariot base was offered with many of the medium Willitts horses, not just this
This piece probably came with the 'regular' base configurations as well, most commonly with an oak music-box base.
The piece is about 7-8" to the top of the pole. This particular one does have a coin, that says "Heritage Collection".
The music box plays "The Carousel Waltz".
The average price of this piece when new was $40-$65 on a regular
base, more for the chariot backpiece base.