Hand Stitched Buttonhole on a Hand Tailored Garment. It takes a certain level of refinement to appreciate a subtle detail such as a handmade buttonhole. An appreciation of time and the skill needed to craft such a piece of art. Each one is different like a signature, a level above the monotonous symmetry of a machine made buttonhole. The fineness of the stitching - again not something that can be done by machine.

Interesting article from the Parisian Gentleman discussing this point:

http://parisiangentleman.co.uk/academy/signals-of-a-handmade-suit-the-braving-of-the-buttonhole/