Here's why:
* Currency is based on denominations: The value of a currency is defined by its denominations (e.g., 1 dinar, 5 dinars, 10 dinars). There's no recognized currency unit called "25 Iraq dinars with three white horses."
* Horses are not currency: Horses can be valuable, but they are not a form of currency. Their value is based on factors like breed, age, health, and training.
Perhaps you're referring to a collectible item? If you have an actual object with this inscription, it might be worth something based on its historical significance or artistic value. However, without more information, it's impossible to say.