Actually no-one knows who actually designed what became known as the Vertigo “swirl’. But the logo for Vertigo records, a subsidiary of Phillips/Phonogram created in 1969 and in its heyday between 1969 and 1974, is so akin to Bridget Riley’s Op Art work that she’s widely accredited as the designer.
All we know for sure is that the label first appeared in 1969 as this advert from the International Times of November that year attests.
The Vertigo “swirl’ typically covered the centre hub of the A side of each album/single released by the label. The B side had the song listings and timings. Vertigo as a label remains but trades today under the ownership of Universal Music UK.