Nagai Gou-ban: Barbara
永井豪版ばるぼら · ながい ごう ばん ばるぼら
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
Words from Nagai Go (excerpt from the introduction): The same year as Barbara, Tezuka began serializing Black Jack, and the following year ('74), he introduced Black Jack's assistant Pinoko in the same work, which I think was the prototype for the two characters in Barbara. I think Barbara is a very significant work that marked a turning point in Tezuka's works. I hope you enjoy Barbara: Go Nagai Version, a new interpretation of Barbara in my own way. (Source: Shogakukan, translated)
Source: AniList
External databases: AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections