Instead of the energy from the mainspring flowing right into the escapement, it must first pass through Arnold & Son’s constant force mechanism. The controlled power supply costs a little hairspring, which releases a constant amount of power to the tourbillon once a second. With this mechanism, there will still come a stage once the energy released by the twin barrels along with the constant force mechanism drops below a stage that is sufficient to keep up a normal output. When this happens, the watch stops rather than letting an isochronal error to creep in the timekeeping.In accession to this interesting solution, the Arnold & Son Continuous Force Tourbillon comes with a deadbeat seconds complication, which leads to the seconds hand to “tick” instead of sweep as one might expect in a mechanical timepiece. Outstanding consistency is attained thanks to the symmetry of the motion’s construction, in addition to the fact that the continuous pressure escapement remains stationary through performance, while the tourbillon cage rotates once per minute. This is in an effort to decrease the influence of gravity to the escapement’s operation. Assuming, though, that this view is not likely to be worn in the presence of strong magnetic fields (it’s barely acceptable for use on a construction site or while flying a helicopter, by way of example), the complication perfectly matches the intended application.The Arnold & Son Continuous Force Tourbillon watch is a limited edition of that only 28 will be produced. The A&S5119 movement has 39 stones, a thickness of 6mm, a 90-hour energy reserve, and works in 21,600vph. The movement is almost perfectly symmetrical, and each of the specialized components are visible on the dial-side. The three-dimensional movement architecture is intended to replicate the English heritage of marine chronometer structure. The watch is water resistant to 30 metres and comes on a hand-stitched brown leather alligator strap.
The Arnold & Son Time Pyramid, a skeleton watch with an unusual, triangular movement layout, is now available in steel at a more accessible price.
Introduced at Baselworld 2013 in rose gold, the Time Pyramid from Arnold & Son is now available in steel. The Time Pyramid is a skeleton watch with a symmetrical movement layout running from top to bottom. At 12 o’clock sits the balance wheel, and below it the gear train. At either side of six o’clock are the twin barrels, each with its own power reserve indicator at three and nine o’clock respectively. Together the twin barrels provide a 90 hour power reserve. Both the areas at two and 11 o’clock are left unoccupied, giving the movement a triangular form with the balance wheel at its apex. This shape is inspired by English skeleton clocks of the nineteenth century, which used similarly shaped movements, but in a standing clock form.
The movement is finished in a grey platinum alloy plating. And the steel case measures 44.6 mm wide, with the crown at six o’clock. The Time Pyramid in steel retails for 27,350 Swiss francs before taxes, equivalent to about US$30,400 or 38,500 Singapore dollars. That’s a third less than the rose gold version. – SJX Follow us on Facebook, Instagram and Twitter for updates and news.