Do I have a 1911 Five Pound gold coin on one side of the coin reads Georgivs V dgbritt omn rex fd ind imp and on the other side is St George slaying the dragon 1911 coin is 16mm diam?

Answer 1

No, it is not a Five Pound coin.

There were four different gold coin issued in 1911 with George V on the obverse and St George and the Dragon on the reverse. The Five Pound and Two Pound, both as Proof only, and the Sovereign and Half-Sovereign.

The Five Pound coin was the largest of the gold coins in 1911 at about 38mm.

The Half-Sovereign was the smallest of the gold coins in 1911 at 19.5mm.

I cannot find any reference to a 1911 British 16mm gold coin.

Answer 2

The Royal Mint has not issued any 16mm gold coins as you describe. It sounds very similar to a Sovereign or a Half-Sovereign, but smaller.

There is a dealer of questionable reputation claiming to have exclusive rights to a quantity of Quarter-Sovereign coins, a coin that was never produced until the Royal Mint produced one in 2009.

Alternatively, you may have a privately issued medallion or token issued for the Coronation of George V.