Around 1980, a game-used bat of the late Minoru Mizutani from his time with the CARP. Currently, only NPB authentication marks are used, but back then, authentication marks were based on numbers. 001 → ZETT 002 → Mizuno I believe it was something like that. Nowadays, it's recognized as an inexpensive line, but back then, Mizuno Pro didn't exist, and World Win was considered the highest peak, so unlike recent game-used/issued items, it's correct that it's not MIZUNO PRO. The grip end has the C4 engraving. Nowadays, if you become an ambassador, your name is engraved on the hitting surface, but this was likely not the case back then. I believe his name was Jun Ishii at the beginning of his career, but during the transition period to major manufacturers around the 80s, he may have used ZETT and Mizuno. It's too old, and I couldn't find any images of him holding a Mizuno bat during his Carp days, but in footage from his time with the Hankyu from 1983, a bat that appears to be exactly the same design as the item for sale is visible. He is also famous for nurturing Carp's representative players such as Tomonori Maeda and Tomoaki Kanemoto, as well as top players in the baseball world such as Norihiro Nakamura and Kosuke Fukudome. There are no signatures or name inscriptions. No cracks. Since there isn't much sign of use, strictly speaking, it might not be game-used, but I believe it is definitely a player-issued item.