The Wonders of a Waistcoat
I say "almost exactly" because there is one thing that I did change and that is the notched collar. I made mine un-notched. I also added an extra button so the front looked more symmetrical.
But, I have to say it's the shape of the back that I like the most. And I loved how they made the yoke and collar from a satin fabric but the lower back was in the main fabric, so of course I did the same. Although when I made this, I lined the yoke rather than just turning under the side edges. That wouldn't do at all lol! ;)