https://www.macfilos.com/2023/09/06/highlights-of-the-october-wetzlar-camera-auctions/
The highlight is obviously 0 Series No 121. I have included photos of some of the items in Wilhelm Albert's diary which also appear in the auction, such as the flip up rear door on an LTM Leica, work on which started some 20 years before a similar door appeared on the Leica M3 of 1954. There is a link in this article which will lead to the catalogue which contains many other interesting items.
William