With Arnold & Son’s limited white-gold edition DSTB timepiece, the 251-year-old horologic house brings its artistry to the surface. As the name would suggest, the latest Dial Side True Beat (DSTB) presents its automatic movement (with a proprietary true-beat seconds complication that marks the passage of each second with a small jump of the hand) directly on a dial encased by 18-karat white gold. At the 11 o’clock position, the complication’s hands, anchor-shaped lever, wheels, and bridges brilliantly stan…