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You can have many reasons to want to avoid batteries. They must be changed and if they are empty and will remain so, there is the risk that they start leaking. They are environmentally not optimal when compared with the purely mechanical alternative.

There are not that many battery powered devices that have over 20 years and still used. For quality instruments, there is no age. Most will serve a few hundred years if they do not get into neglect. But they want to be part of this we have gained our new-old instrument after a few hundred years famous models.

But new technologies and materials have reduced the friction and the precision and the influence of UV radiation from the sun.

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