Eiji Tsuburaya didn't design him as Altman when he filmed Sai Wen. His worldview is completely independent and has nothing to do with the worldview of the first generation Altman. The name Ultraseven, not ULTRASEVEN, is the best proof. It was not until Jack's first generation Altman and Sai Wen appeared at the same time that the two worldviews were linked. Saiwen officially joined the ranks of Altman, but the name is still Ultraseven.
As for why many Altmen imitate Saiwen, do you understand? Later, Altman's designs were almost all based on the original generation and Saiwen. Max is a retro work and will naturally pay tribute to Sai Wen. Sai Wen 2 1 refers to Sai Wen Altman in 2 1 century; And Severn X is the 40th anniversary of Severn!