Sometimes the bottom part of the die was pressed in more forcefully than normal at the expense of the top portion, like in this example shown earlier:
[img]http://photos.imageevent.com/drumaholic/cymbalexamples/websize/no%20star.jpg[/img]
As seen in this case the star barely made it. The trademark in question was just a more extreme example where the star didn't make it at all.