The initials under the bust tell me that it is definitely modern, Donald R Golder did that one in probably about 1999 I believe, re modelled for a special African coin to commemorate 100 years of the British monarchy, that never was. Don't touch it with a barge pole, and the seller is either a fool, or lying. Isn't it potentially dangerous with all these patterns around, when they fall into foolish hands....And it already has a bid. Knowledge is power.