Continuing with the coat body:
The first step is to locate the pocket position and sew it down. The facing is temporarily pinned in place, the pocket is basted in and the edges turned under. Here it is after being sewn on:
The facing is then turned back over the pocket seam allowance and basted down, to be finished later.
The side and shoulder seams are now sewn. However, instead of being pressed open as on the lined coat, they must be felled to prevent wear. This is done by clipping one side of the seam allowance short and folding the other over it, then sewing it down with a whipstitch. Here the stitching is in progress on a shoulder seam:
Here's what the finished seam looks like from the outside. The stitching is barely visible, but the seam makes a perceptible "bump" on the outside of the coat. The same technique is appropriate on unlined linen civilian coats, and men's shirts.