I am surprised one of these medals warranted a 70 grade. So many of the silver God of Longevity silver medals have problems with production, handling or storage which are obvious with a mere glance and require a grade of 69 and below. As an example, the mint placed them in hard plastic holders which, over time, result in a purple or black hue around the outer edge of one side of the medal and a dark black discoloration on the rim. Often, the purple may be removed by NCS conservation efforts and the black may not. Also, the head of the God of Longevity will display rub marks due to movement within the hard plastic. A PF70UC, imagine! I would be pleased with a 68 or 69.
Mark Bonke