Looks like a nice head, long and good bases. However much depends on the weight once dried, but I would say a bronze possibly silver, but its never easy by looking at photos.
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Here are 3 heads the middle is gold and the right and left are two medal heads taken over a weekend this year off my ground. The right is going to go gold I would say, and the left bronze, possibly silver.
Hope this helps to give you some indication of what a medal head looks like.
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ATB
Sikamalc