Arnold & Son Instrument CTB, World’s First Chronograph With True Beat Seconds

Arnold & Son - Instrument CTB 2

The Instrument CTB is the fourth Baselworld-bound watch from Arnold & Son stables. Other three watches the DSTB, the Double Tourbillon Escapement Dual Time, and the Royal TEC1 are all part of a series to celebrate 250th anniversary of the company. With the DSTB, the watchmaker introduced to us the Dual Side True Beat. With the CTB, we are introduced to the true beat seconds on a chronograph – another first in the world of watchmaking.

The true beat seconds is a precision function wherein the seconds beat incrementally as opposed to sweeping along the dial – allowing for more accurate reading. The true beat seconds is incorporated on the same axis as the chronograph seconds hand. Both hands jump at different intervals, with the chronograph hand giving the impression that it can catch up to the true beats hands – that never happens as true beats hand jumps away each second.

The dial has a light-grey ad silver finishing on the background. Hour and minute sub-dial with Roman numerals is located at 12 o’clock and the 60-minute chronograph with Arabic numerals at 6 o’clock.  True beat seconds and central chronographs seconds hands in blue are at the center. The blue hands with closed arrow tips indicates the chronograph functions, while the open arrow tipped hands show timing functions.

Arnold & Son - Instrument CTB 1

Powered by the in-house made A&S 7103 caliber automatic movement, it carries a power reserve of 50 hours without use of the chronograph and a frequency of 28,800 vph. It is water resistant up to 30 meters. Movement decorations visible through the sapphire crystal case-back features traditional finishing such as hand-chamfered bridges and polished edges, fine circular graining and Côtes de Genève rayonnantes, circular satin-finished wheels, screws with bevelled and mirror-polished heads. Oscillatin weight has skeletonised decorations with brushed surfaces.

The stainless steel case measures 44 mm and available with a hand-stitched black or brown alligator leather. The CTB is part of the instrument collection of Arnold & Son and will be priced at $27,135.


Source: Arnold & Son

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