Sad news indeed.
For those of you who haven't heard of Claus. In the German ukulele community he was a true legend.
Just a few weeks ago, I visited him in his workshop and he told me his story of how the ukulele found him:
He started building guitars more than 40 years ago. Later in his career, he also was building so called "Hamburger Cithrinchen" (
https://www.instrumentenbau-kilian.de/hamburgercithrinchen.html). One day, his wife came home with a photograph she found on the internet. A photograph of a luthier made Zither from Brasil that looked just like Claus'. (Anyone knows who that might be?) He did some research and what he found out was that the instrument on the picture actually was an ukulele with just the appearance of a Hamburger Cithrinchen.
So, the first ukulele Claus built was a "converted" Zither - 8 strings. Claus later found out about the old taropatches Martin did and kind of specialized in making these (he was still making normal 4-string ukuleles, of course).
That was around 2002. Shortly after that, he stopped making guitars for good and specialized in making ukuleles only.
Claus was a one-by-one-builder. That is why there aren't too many Mohri ukuleles out there. Here is one of the few existing sound demos:
Two years ago, he build me an all maple concert ukulele. Here are some pictures of it:
http://ukulelezeit.de/meine-claus-mohri-ukulele/
I will miss him deeply, and yet I am happy and thankful to always be able to be reminded of him when playing my Mohri uke.