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wholesale jewelry milwaukee I. Structural anti -counterfeiting
The shapes that have never appeared in ordinary commemorative coins and precious metal commemorative coins -rounded corners.
. The sideline anti -counterfeiting
The outer edge silk tooth is used, the dense silk teeth are arranged in an orderly arrangement, which changes according to the changes of the style shape.
three, invisible graphic
When the coin is appropriately tilted, at the bottom right of the Taishan pattern, you can observe the world heritage logo pattern.
. Fourth, micro -shrinking text
It's local mountains of Taishan pattern can be observed. Shan), at the bottom left of the Taishan stone carvings in the Taishan pattern, the word "mountain" of the carcass can be observed. There are two dots on the mountain on the lower half of the back of the back. There are 23 points on the left and 22 points on the right, which has anti -counterfeiting characteristics.