Hi
Eric, congratulations on acquiring such a
rare and fascinating coin. I have not seen this issue before, and it strikes me that the
horse is clearly doing a
Spanish Walk. The original purpose of the start of the movement in the wild is to challenge a rival. Training can extend it into a graceful walk, this but requires a lot of time and patience, and some horses never manage to learn it. It makes me think it is probable trained horses performed this and other kinds of movement for ceremonial occasions in the
Roman world.
The first YouTube clip shows a
horse challenging another with the start of the movement-
https://www.youtube.com/watch?v=Ti2Y1xE-xP0 The second YouTube shows a
good example of a
Spanish Walk-
https://www.youtube.com/watch?v=srFv-8MAW2A Best regards,
Steve