Double Tourbillon Escapement

Reference: 1DTAW.S01A.C121W

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Limited Edition: 28 pieces
Case: 18-karat white gold
Size: 43.5mm
Movement: hand-wound manufacture caliber A&S8513
Function: dual tourbillons, dual time displays that can be set independently
Power Reserve: approximately 90 hours
Water Resistance: 30m
Dial: two white lacquer dials, Roman numerals for the local time and Arabic numerals for the reference time
Caseback: sapphire crystal
Strap/Bracelet: hand-stitched alligator leather
Factory Warranty: two years


The symmetry of the indications – an Arnold & Son signature – is particularly evident on the DTE. The two time zones – local time in Roman numerals and reference time in Arabic numerals – are superimposed at 12 o’clock and 6 o’clock respectively. The tourbillons mirror each and appear to float in mid-air thanks to their hand-chamfered 18-carat gold bridges. To add to the balance of this timepiece, the crowns are positioned at 2 o’clock and 8 o’clock, allowing each time zone to be adjusted independently.

The DTE combines Dual Time with two tourbillons. In the A&S8513 caliber, they are connected by a common motor organ, a pair of barrels providing a running time of 90 hours. These barrels then supply each of the separate gear trains, which each end in a tourbillon. These independent components indicate the hours and minutes and ensure an exceptional level of timekeeping.