At the end of yesterday's blog I decided that the plain exposed seam I had tried (and was planning for the entire helmet) wasn't the best choice, so I ripped out the one seam that I had done, and restitched it.
I replaced the side seams with overlapping seams, and for the center seam I chose a butt seam (since an overlapping seam has to favor one side or the other, and won't be symmetrical).
There are three different types of handsewn seams that I use in my leatherwork: Overlap, butt and plain. Below are the three types illustrated.
The plain seam can add structural strength and really emphasize the seam line, as can be seen on my firemaster's helmet. It is the historically traditional seam for firefighter's helmets, but it requires more effort to shape. On my steampunk gas mask you can see examples of the butt seam and the overlap seam.
Once the wet-formed helmet has dried, I will figure out the removable front piece that will cover the mouth, and also design a piece with a lense to cover the eyes.