I think it has very clear 1960's Mod influences. It is a simple shape, a short style and it actively avoids the appearance of curves! I feel positively Twiggy-esque in this dress and the associations with the music and fun and non-conformity of Mod culture are very appealing to me.
As you can see, the front is cut very straight, avoiding the appearance of empty fabric that haunts me with most of the dresses I try. I have been experimenting with how to transition my wardrobe into Autumn this week, and have found that this dress also looks good with a long-sleeved knit top underneath and the sandals swapped out for boots. But for now, whilst temperatures are still in the 30's I am happy to wear it as is, and grateful for the extra ventilation provided by the cut-out back and the shorter length.