Chronoswiss Tora Chronograph Ref. CH 7420 – Platinum, Guilloché Silver Dial, Full Set

A rare and highly characterful Chronoswiss Tora Chronograph reference CH 7420 in platinum, featuring a hand-guilloché sterling silver dial, dual-time chronograph layout, automatic calibre C.743, and full set in great condition.

Offered here is a highly distinctive and uncommon Chronoswiss Tora Chronograph reference CH 7420, a watch that captures the neo-classical identity of Chronoswiss at its most expressive. Produced in platinum and combining a chronograph with a second time zone display, this reference belongs to an especially appealing era of the brand, when traditional dial craftsmanship, mechanically interesting complications, and unconventional case architecture were brought together in a uniquely recognizable way. Offered as a full set and in great condition, the present watch represents a compelling opportunity for collectors seeking an unusual platinum chronograph from an important independent-minded maker.

The defining feature of the present watch is its richly detailed dial, executed in sterling silver and decorated with traditional hand-guilloché work. The shimmering silver surface, paired with thermally blued Breguet-style hands, gives the watch a refined and highly classical appearance, while the chronograph and second time zone indications introduce a more technically expressive character. The blue pusher at 10 o’clock is a particularly unusual and attractive detail, designed to correct the secondary 24-hour time zone without interrupting the running of the main display, adding both functional complexity and a distinctive visual signature.

Housed in a substantial platinum case, the watch measures approximately 38 mm in diameter and around 15 mm in thickness, giving it a strong presence on the wrist while preserving elegant proportions. The case architecture is especially elaborate, with the weight and density of platinum adding a palpable sense of substance and quality. The model is further known for features such as double-sided sapphire crystals, water resistance to 30 meters, and Chronoswiss’s characteristic neo-classical styling language, which balances traditional watchmaking cues with late-20th-century mechanical individuality. 

Powering the watch is the automatic Chronoswiss calibre C.743, based on the robust Valjoux 7750 architecture and reworked by Chronoswiss for this model. This movement offers a chronograph, date, day/night indication, and second time zone functionality while delivering reliable daily performance and the charm of a well-developed traditional automatic chronograph platform. In higher executions such as the platinum version, the movement is further enhanced by a platinum rotor and additional finishing details that underline the elevated position of the reference within the Tora family.

Unusual, mechanically engaging, and full of personality, the Chronoswiss Tora Chronograph CH 7420 is a rare platinum complication that offers both technical interest and distinctive design appeal. For the collector seeking an under-the-radar independent-era chronograph with strong character and precious metal execution, it is a notably attractive proposition.

Included:

Watch with full set

Specifications

Brand: Chronoswiss
Model: Tora Chronograph
Reference: CH 7420
Case material: Platinum 950
Case size: 38 mm
Thickness: 15 mm
Dial: Sterling silver hand-guilloché dial
Hands: Thermally blued Breguet-style hands
Movement: Chronoswiss calibre C.743, automatic
Base calibre: Valjoux 7750
Functions: Hours, minutes, chronograph, second time zone, day/night indication, date
Crystal: Double-sided sapphire crystal with anti-reflective coating
Water resistance: 30 meters
Set: Full set
Condition: Great condition

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