The tidal range is the vertical difference between the high tide and the succeeding low tide. Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of the Earth.
Coin toning can intrinsically increase or decrease the value of coins. Natural coin toning can be quite beautiful. It can also be outrageously ugly. And because beauty is often times in the eye of the beholder, placing a value on a coin due to its toning can present problems.
But somewhere along the line, when it comes to buying tires some people lost sight of that simple fact. And somehow the name on the tire actually became more important than the tire itself. Double Coin believes that in a world of shrinking margins and rising costs, value has never been more precious.