I thought the accompanying video and articles (though a bit dated), offer a very good visual explanation and readings of why Patek Phillippe (and others) are considered Haute Hologerie. Patek is probably my favorite (especially the Calatrava line) of what is considered the Holy Trinity, with Audmars Piguet and Vacheron Constantin rounding out the trio. In the case of Patek, they have been manufacturing pieces since 1851, and have consistently been in the business of creating and crafting luxury goods, or Haut de Gamme. None of these three have essentially ever deviated in their respective existence of offering items that are finished by hand to a very high degree of quality and luxury, and because of some of these reasons, are the things that help define what brands are and those that aren't considered Haute Horlogerie. I present this purely as a matter for hopefully expanding some peoples understanding and enjoyment of all things watches.