Vintage Lorrie Deb Dress Union Made needs work

Vintage Lorrie Deb Dress Union Made Yellow Short Sleeve Flowy Dress 7 Needs Work. Gorgeous vintage piece! Need some work! Stitching is coming undone on the top of the sleeve as well as a small burn mark on that same sleeve. I’m not exactly sure what the slit in the back is. It might be intentional but I’m not sure. Both of these are on the seam and easy fixes! Women’s size 7.