Great Britain
George V Proof Shilling 1930 PR66 NGC, Royal mint, KM833. An exceptional example of this very rare date in proof with white, highly reflective surfaces and no readily apparent imperfections. We note the sale of a single other example that was sold by Stack's in December of 2006 for $900 hammer. This example, seemingly much nicer, should be worth much more today.
Estimate: 1500-2000 USD