I don't take PSA's definition of what constitutes a variation very seriously; they will create a slab for any new version of a card before doing deep research, thus causing pandemonium within master set collections.
That being said, the 'streak' examples look like something dirty was on the printing plate. It was eventually cleaned, and we may actually have a new VAR here.
This site does list a number of VAR (about 6-7) from the 1967 set which are just one-off printing glitches, however I'm unsure they will ever be removed.
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