New Coin Challenge for September

Introducing – a new coin challenge just prior to the September monthly coin show.

First, the picture:

Coin Challenge Calf

Next, a few hints:

1. It’s a male calf fighting the rope attached to its halter
2. From the color, the coin is a shiny silver coin
3. The father of the gentleman holding the calf was a mathematician

That’s it, for now.

More hints in the future.