Well, that looks familiar. I KNOW I have seen those keyholes on a vintage pattern. So I searched my Etsy page which took a while because I had all decades of patterns in one section of my shop (which resulted in hours of rearranging my shop, now much easier to browse!) Eventually I went through the sold items and was able to find it! Totally worth all that effort.
And there you have it! Mystery solved! Now you can get this pattern and make your own version of Twirl Next Door. Probably for less than $83.