With that kind of percentage I'm guessing it's likely a side effect of the manufacturing process and not strictly speaking a "trail die" but all the trails seem to be coming off of hard edges/corners, of which in much of it there are a plethora. Also, all the "trails" are going in the same direction on the coin. The angle varies between coins, but the direction is uniform on each. Went a little arrow happy, but it can be very difficult to tell what in a closeup a person is looking at, so I erred on the side of caution.
First one. First image are two large trails coming off the points of the N in NASA. Second is the stars under the N. Third is the stars inside the top part of the ellipse in the logo, fourth is the stars above same.
Will do one post each for the other two.
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