Here are the finished boxers. I added the buttonholes using my new toy a Griest #1 template buttonholer for low shank machines (this means YOU Mr Singer 201K). I was very happy with the results. I am planning a full photo-tour and review of the new (to me) buttonholer in a future post.
Front and back there are seven half-inch buttonholes and one additional thirteen-sixteenths vertical buttonhole which allows the waistbands to cross at the back. It's a lot of work but we all get a buzz out of using an automatic buttonhole attachment right?
The position of the buttons at the back give a range of adjustment for expanding and contracting waists. I think this design must have arisen from wartime and post war shortages of elastic.
The half inch (12mm) buttons I used were saved from shirts I cut up last year to turn into my first quilt. There a total of nine so I think can be forgiven for sewing them on with the Singer 401G. I used white thread to match the buttons rather than pink to match the shorts. Sewing buttons on with a vintage Singer is probably worth a post all of its own sometime soon.
I am happy with the way these turned out but. I will need to forget how much work they are before I am tempted to make them again.