Kriegstagebuch - German Corps Commander On The Eastern Front Unknown

Eastern Front war diary: rare, quite probably unique German Corps Artillery Commander's war diary. These kriegstagebuchs were mostly written post-war, from memory, many by high-ranking German officers on behalf of the US Army, others simply by troops. But this appears to be written in situ on the Eastern Front - to the best of my ability, I've never found a mention of the man's name in the texts. However, he talks about being subordinate to Generalleutnant Kurt Rüdiger, a Brigade Commander appointed to Artilleriekommandeur 121. It starts with the German Greek campaign, and goes through Moscow and on to Finland. The contents page shows where. What makes this more unusual, is the book has more than a dozen companion A4 sketch maps - shown - and many small typographical corrections throughout. While it's most definitely a font of insight in its own right, I'm selling it as I'm making room for more books.