Jani stumbled across an interesting example on Egun:


https://www.egun.de/market/item.php?id=20053037


[Linked Image from thumbs2.imgbox.com]

[Linked Image from thumbs2.imgbox.com]

[Linked Image from thumbs2.imgbox.com]

https://patents.google.com/patent/DE4439054B4/de


Oddly enough, it will be 10 years next year since Dietrich's passing. Wow how time flies.....

Hochachtungsvoll,

Raimey
rse