The Arnold & Son Double Tourbillon Escapement Dual Time watch � DTE - is described as a marvel of mechanical mastery and aesthetic elegance. Part of the Instrument Collection, the watch features a signature in-house manufactured movement inspired by the timepieces produced during the second part of John Arnold�s life when he and his son, John Roger, dedicated themselves to the quest for absolute precision.http://forums.watchuseek.com/f381/arnold-son-double-tourbillon-escapement-dual-time-watch-1824370.html#post15257434

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