One of Arnold & Son’s 2017 launches is the DBG (‘double balance’ and ‘GMT’) Dual-Time Skeleton, the latest addition to the (Double-Balance GMT) collection, which was launched in 2013. For those unfamiliar with this watch and concept, it consists of two movements (i.e. each time display is powered by its own barrel, with its own gear train, escapement, and balance), sharing a single winding system.
These two time zone dials, as with previous models, feature Arabic numerals for one time zone and Roman numerals for the other. They made of ‘smoked’ metal-treated sapphire crystals. They are set by their own crowns at 3 and 9 o’clock, but winding the watch is done solely by the crown at 3 o’clock.
That the two separate time displays are each driven by their own barrel and gear train with their own escapement and balance means that the two sets of hour and minute hands are set independently of each other. This means that the GMT function includes the ability for each time zone display to be set in 15 minute increments, something of particular note not just for those of us in Australia.
Additionally, the small 24-hour display at 12 o’clock determines the difference between each time zone dial, as well as indicating whether it’s day or night in the second time zone. Both time zones share the same slim centre seconds hand.
Coming in a 44mm rose gold case, the view from the back reveals open bridges, barrels and gear trains on the in-house Calibre A&S1309. The bridges are rhodium treated and chamfered with polished edges, satin-finishing,circular graining and Côtes de Genève. The main plate is NAC grey treated, and wheels are satin-finished. This new skeleton movement beats at 21,600VPH and has a 40-hour power reserve.
The Arnold & Son DBG Skeleton is limited to 30 pieces. The price is 35,300 CHF (excluding taxes).