Eurostyle was used for the end credits in Season 1, so would certainly have been kicking around.
It became a sci-fi staple, and in modified form, was heavily used in the Star Trek movies.
Could equally be the very similar Microgramma (which also has Trek heritage), which has the same feature of the 6 having a fuller, rounder lower half than the 8. At this resolution, it could be why we're struggling to see the slither of daylight in the upper half of the 6.