I've had quite a bit of experience with this variety. On a typical well-worn coin, it's easy to verify a genuine specimen by comparing the tip of the bust to the tip of the serif on the "1", and then the position of the denticle below the "1". In this case that isn't possible because the denticles are gone and the corrosion is quite advanced, so comparing the digit tops to the bust's bottom contour is the best bet.