Brand: Mitsubishi Pencil Co.
Made in: Japan
Three different sizes of the uni HB. The Jumbo-uni is circa 1985. FYI: The middle pencil is the standard size. Interestingly enough each one of these Jumbo uni's say 85th “Thanksgiving” Anniversary on the reverse.
Founded in 1887 and formerly known as Masaki Yomato, Mitsubishi Pencil Co., Ltd. is best-known today for its uni-ball brand of quality writing instruments sold worldwide. Curiously, this Tokyo-based business is unrelated to Mitsubishi Motors and other brands within the Mitsubishi Group. Same name, same logo, completely different company.