Buttoning leather is a different job from buttoning cloth, and upholsterers treat it as a separate discipline. Leather has no give across its width - it will not ease into a fold the way a woven fabric does - so the entire pattern has to be cut and marked before a single button goes in, and each fold is worked by hand into the position it will hold for the life of the piece. Get one button out of place and the surrounding folds all sit wrong.
The compensation is that leather stays exactly as it was set. A cloth headboard slackens gradually; a leather one holds its geometry for decades and improves in colour as it does.
The pierced crest above is the counterweight to all that firmness. Where the leather is taut and disciplined, the carving is open and loose, cut through so the wall shows behind it. Our master Indian artisans design that contrast deliberately - a bed that was hard-edged at both ends would feel severe, and one that was soft at both would have no structure at all.