New Chronoswiss Opus Chronograph Flag

March 2021

New Chronoswiss Opus Chronograph Flag

The new skeletonised Opus Chronograph Flag is an updated edition of a true Chronoswiss classic. The dial may be scarcely there after the careful and ingenious skeletonising process – but nevertheless the blue and fair subdial perimeters make a great impression. This modern mechanical 300-part horological marvel is sporting blue with highlights in white and red – the three most used colours for national flags.


he mechanical clarity of the Opus Chronograph is achieved by carefully paring away all superfluous material, leaving nothing but a filigreed skeleton – which functions just as well as when fully fleshed. On the new model the bridges of the Chronoswiss Calibre C.741S movement have a galvanic black finish, which provides a shadowy backdrop to the sweeping hours, minutes, seconds, date and the bright red chronograph seconds. You will also see the skeletonising clearer than ever before, as the curved sapphire crystal is now getting a double anti-reflection treatment.

Around for more than a quarter-century, the Opus architecture has been thoroughly updated. Its new geometry combines a 41-millimetre diameter with shorter lugs hugging the wrist more comfortably. Made of stainless steel, the solid construction calls for no fewer than 23 pieces. Finishes include a satin-brushed case band, shiny lugs and the typical Chronoswiss markers of a knurled bezel and generous onion crown. Water resistance has also been improved – now at 10 bar. And the alligator leather band is held in place with screw-in lugs featuring the Chronoswiss patented Autobloc system.

Chronoswiss Opus Chronograph Flag
Chronoswiss Opus Chronograph Flag

The skeletonising on the Opus Chronograph is executed with a pantograph technique – imagine having a larger template made after a handmade prototype. The pantograph uses a steel finger to follow the pattern on the large drawing while a mechanical arm guides the tool that mills the small movement components, in essence skeletonizing them. When Chronoswiss first introduced the Opus back in 1995, it was one of the brands pioneering this technique for skeletonising.

New Chronoswiss Opus Chronograph Flag

Opus Chronograph: Technical Data

Reference CH-7543.1S-BLSI Stainless steel, galvanic blue and silver dial, skeletonized

Displays Sweep hours and minutes, seconds, analogue date, sweep chronograph seconds, 30-minute counter, 12-hour counter

Case Solid 23 pieces, stainless steel case, with satin finish and polished, bezel with partial knurling and curved, double coated anti-reflective sapphire crystal, screw-down case back with satin finish and sapphire crystal, onion crown, water resistance up to 10 bar, screw-in lugs with patented Autobloc system

Measurements Ø 41 mm, height 14.80 mm

Movement Chronoswiss Caliber C.741S, automatic, skeletonized

Diameter Ø 30 mm (13 1/4 ́ ́ ́)

Height 7.90 mm

Jewels 25

Balance Glucydur, three-legged

Balance spring Nivarox I

Fine adjustment Via excenter cam

Shock protection Incabloc

Frequency 4 Hz., 28‘800 A/h

Power reserve Approx. 46 hours

Special features Skeletonized and CVD-plated blue rotor with Côtes de Genève, ball bearings; polished pallet lever, escape wheel and screws; skeletonized bridges and base plate with perlage, galvanic black

Dial Skeletonized, galvanic blue and silver

Hands Breguet Losange shape, lacquered white and red

Recommended retail price: CHF 11,400 / € 11,500 / USD 11,400 / GBP 9,800

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