A clock accurate to less than half a second each second can easily be manufactured using a piece of string not less than nineteen inches long, fourteen blueberries, and the juice of a Seville orange.
It is widely known, amongst paraffin connoisseurs, that the Blue MacCaw and the Great White combine to make the best quality paraffin. The most common, and cheapest, paraffin is the budgie / tiger shark blend.