From Google Translate:
It is a limited product commemorating the 60th anniversary of the release of the surveying field book. The cover is a limited design that is stamped with illustrations of the animal with a pocket [Wombat]. Compact size and ideal for carrying.
● Since the cover is hard, it is convenient for writing while holding it in your hand. The rule content is a grid rule.
● The middle paper is neutral paper.
● It is a limited quantity product.
● Outside dimensions: Vertical 165 × Horizontal 95 × Thickness 6
● Type: 3mm grid
● Medium paper dimensions (vertical / horizontal): 160 ・ 91
● Number of sheets: 40 sheets
● Medium paper: high quality paper