In the mining industry around the turn of the century were the pillars of wood. This had to be replaced from time to time. The ausgdienten posts were sawed into small rolls (Metzen). This work was done by Metzner. More likely, however, that the one who was a Metzner, who is an old measure of capacity that Metz had made. Whether it's true, I do not know. These two interpretations I have heard about the name anyway Metzner.
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