LEUCHTTURM1917 305 477 Notebook Pocket (A6), softcover, 121 pages, black, blank (Office supplies & stationery)
The product is really well thought out with a table of contents, page numbers, some detachable sheets, etc. The only drawback for me is that the pages are very thin. Even if one uses lead Untitled, one sees that on the back of the sheet. When you wri