Interesting, I'm getting these dresses consistently on different checkpoints, have you added 1950sfloraldress to your prompt? You can also add 1950s floral print dress to help it along. But I'll also check out the mix

I looked for the mix, here on civit and on google and I can't find it, but I'm pretty sure if you start your prompt with "1950sfloraldress, 1950s fashion" you will get this dress. You can also look at the prompts of the preview images for help. Also keep in mind that if you have a very long prompt, you can repeat the "1950sfloraldress, 1950s fashion", because of the 75 token thing. I get away using it once for a 75-150 token prompt, but over that you might have to repeat the trigger for it to stay effective.

@Stapfschuh Sorry, now I am confused, you didn't use the model, but all the examples are 1950s floral dresses, so now I am confused why you would think it wouldn't gen exactly what I intended it to gen. Maybe you can explain better what the problem is. 

I love to learn, so if you would, please reply. Thank you in advance!

@Stapfschuh Ah, I understand, I kind of want the 1950s aesthetic for the entire thing, but in the end when I have made a models of the 1920s to the 2020s, then I will also create one model with all of them in one model, which will make overlapping easier and allow you to prompt away the 1950s look by adding it in the negative. But having a "modern" 1950s flower dress might happen in the future as well.