One for the "more complex than it looks" box, the flight jacket. It is on the face of things a simple-enough five-button jacket but, under the bonnet, as it were, there are at least two or three things that you don't come across every day of the week.
This is known as a saddle shoulder: seen every now and then in knitwear, but for one reason or another — perhaps because it is very tricky to develop and sew — rarely if ever in the world of cut-and-sewn. It gives an untrammelled drape over the shoulder, but still the clean lines of the more typical set-in sleeve.
The jacket has in-seam pockets which are build into the side-body; a hem-band with pleats doing the work of (cough) elastic; and in-breast pockets positioned unusually high — handy on a flight jacket, you'd think, whether in the cockpit of a private jet or cattle-class of a commercial one.