I kept this at home, almost never using it. There are some marks from the clip where a pen was inserted. This is a wrap-style system notebook made of textured kudu leather, which closes with a button. It has a pen holder that can accommodate a thick fountain pen (up to 15mm in diameter). The 13mm rings can hold a large number of sheets for carrying. [Materials] Outer leather: Kudu, Inner leather: Buttero Retail price: 23,100 yen [Size] Height: 150mm, Width: 105mm (closed), Thickness: 35mm