Abraham-Louis Breguet designed them to solve a practical problem: on a guilloché dial, a solid hand would disappear into the engraved pattern. The solution was to remove metal at the tip, leaving a pierced circle — the pomme évidée — with a thin point extending beyond it. That point indicates the hour with precision; the hollow circle lightens the visual weight without sacrificing readability.
The correct form has three distinct elements: the tapered stem, the eccentric pierced circle, and the sharp tail that extends beyond the circle. When any of the three is missing or poorly proportioned, the result is a hand inspired by Breguet style, not a true Breguet hand. The difference is visible to the naked eye: in budget copies the circle is centered, or the tail is too short and stubby.
The traditional finish is heat bluing: steel hands are heated until they reach oxide blue, a color varying from violet to sky blue depending on temperature. The process is done by hand, piece by piece, and there is no way to achieve the same result with chemical or galvanic treatments: the tone is different, less deep. Houses like Breguet itself, RGM and Kari Voutilainen continue to flame blue; others use rhodium or gold for non-traditional but documented variants — see the rose gold hands of the Classique 7637.
Cartier uses the same hands on the Santos-Dumont and calls them pomme; H. Moser adopts them with discretion; Daniel Roth had incorporated them into his aesthetic grammar. It is one of the very few elements of eighteenth-century watch design that has passed through two and a half centuries unscathed without becoming mere quotation: it still works, because the constructive logic behind it is solid.
A detail noticed only at the workbench: on the hands of early nineteenth-century production the stem is often slightly concave in section, not flat. In modern production this concavity almost always disappears. It is not wrong, but those who seek it know how to recognize it.