Arnold & Son’s Time Pyramid 42.5 presents a stunning combination of modern engineering and classical inspiration, reshaping traditional watch design with its innovative vertical alignment. Drawing from the rich horological history of John Arnold and his contemporaries, it revives a clock style popular in the 1830s, challenging conventional design by arranging the movement’s components in a top-to-bottom sequence rather than a circular layout.
The Time Pyramid 42.5’s design is a masterful blend of heritage and innovation. It features a newly designed case with a diameter of 42.5 mm and a thickness of 10.72 mm, available in choices of red gold (5N) or platinum (PT950). This redesign highlights the watch’s unique structural elements, including its distinctive crown positioned at 6 o’clock and its symmetrical yet baroque approach. The movement, resembling a pyramid or an anchor—a nod to John Arnold’s naval connections and reflected in the Arnold & Son logo—is elegantly exposed, devoid of a full-sized dial, revealing a skeletonized core.
A novel feature of the Time Pyramid is its case back, employing aventurine glass. This material, with origins in Venice’s renowned glass-making culture, is composed of an ultra-thin aventurine glass disc. The glass, embedded with copper inclusions, creates a shimmering effect reminiscent of the night sky. This unique use of aventurine glass allows light to permeate, creating an enchanting play of transparency and color when the watch is not worn.
The play of light continues on the dial, where alternating gold-plated and NAC-treated finishes exhibit Côtes de Genève stripes. The visibility of the two barrel bridges amplifies the symmetry that is a hallmark of the Time Pyramid.
The movement itself, a central feature of the Time Pyramid, is prominently displayed. The case’s broad aperture and slender bezel accentuate the mechanical layout, with the screw balance majestically positioned at 12 o’clock. Below, a detailed gear train showcases an assortment of finishes, including hand chamfering and sunray-brushed wheels. The caliber’s structure diverges beneath a ring of white opal, a signature element of Arnold & Son’s off-centered dials.
Complementing this design are dual power-reserve indicators on either side of the dial, symmetrically mirroring each other and reflecting the dual barrels powering the calibre A&S1615. This in-house developed and assembled movement boasts a 90-hour power reserve. With the Time Pyramid 42.5, Arnold & Son continues its legacy of marrying classical aesthetics with contemporary horological artistry, presenting a timepiece that is both a nod to the past and a vision of the future in watchmaking.