Eterna Madison Eight-Days with Eterna Spherodrive

Launched at this year’s World, Watch and Jewellery Show, Baselworld, the Madison Eight-Days is fitted with the hand-wound Eterna 3510 movement featuring the new Eterna Spherodrive construction – a novel spring barrel design rotating on ball bearings, in a demonstration of this proprietary Eterna movement’s exceptional distinction.

Established in 1856, Eterna’s own development has paced, and even occasionally spearheaded watchmaking, with its watchmakers and technicians making decisive contributions to the advancement of the industry over the years. Thus, a calibre featuring a power reserve of more than a week is nothing new for Eterna. Already as early as 1915 its watchmakers astonished the world with movements of this kind that would, for decades, show the time in alarm, table and car clocks. The basis for the construction of the eight-day calibre Eterna 3510 is the Eterna Spherodrive design from 2009 – a novel spring barrel design rotating on ball bearings.

By fitting the spring barrel on ball bearings, Eterna engineers eliminated in one go most of the problems caused by wear and tear at the exact point where the movement is subjected to the greatest pressure and friction. Furthermore, the Eterna Spherodrive construction proved ideally suited to the pair of series-coupled spring barrels of the Madison Eight-Days’ Eterna 3510 calibre.

Along with the understated elegance of its stainless steel case with its discreet lateral decoration, water-resistant to 30 metres (~ 100 feet, 3 bars), the originality of the Madison Eight-Days’ dial layout makes it an eminently suitable companion for today’s busy travellers. It provides an attractive choice of silvered, grey or black dial faces with centre cobbled texture and sunray-pattern surround, enhanced with rhodium-plated or gold-coloured baton hour makers and seconds hand while the hour and minute hands are coated with a luminous compound.

Both the oversized date calendar at 2 o’clock on the dial and the power-reserve indicator between 7 and 8 o’clock occupy original, particularly practical positions. A scratch-resistant and antireflective crystal completes this unusual dial face. Secured by four screws, the case back features a sapphire crystal porthole revealing the movement’s intricate workings.

The Madison Eight-Days comes with a brown, grey or black Louisiana alligator strap, coordinated with the dial hue.

Eterna calibre 3510
Mounted on ball bearings in Eterna Spherodrive fashion, this proprietary Eterna movement’s two series-coupled barrels provide the hour, minute and seconds hands with eight full days of exceptionally smooth and regular operation. This extended period is of course also recorded on its oversized date calendar and the power-reserve indicator with 192-hour graduations. What’s more, to protect the movement’s highly precise rate, calibre 3510 includes an automatic cut-off of the balance wheel after eight days’ continuous operation. Equally practical, the fast-acting date corrector, usable without restriction 24 hours a day and positioned at 10 o’clock on the case flank, is ideal for travellers regularly crisscrossing time-zone lines.

Providing 192 hours of power reserve, the hand-wound calibre 3510 with Eterna Spherodrive, 14 3/4 x 12 lines, 28,800 v.p.h., features 7 ball bearings, 22 jewels and a Glucydur balance wheel.

Fitted with the Eterna calibre 3510 movement, the Madison Eight-Days embodies to perfection the spirit of the Eterna brand, fostered by over 150 years of pioneering achievements.

Technical details

Madison Eight-Days with Eterna Spherodrive

Movement
Eterna calibre 3510; hand-wound mechanical movement with Eterna Spherodrive; power reserve 192 h; 28,800 v.p.h.; 22 jewels; length: 33.2 mm (14 3/4 lines); width: 27.2mm (12 lines); 7 ball bearings; Glucydur balance wheel; hours, minutes and seconds, big date and power-reserve indicator.

Dial
Silver, grey or black, cobbled-pattern structure at centre and sunray brushing
Rhodium-plated or gold-coloured baton hour markers
Rhodium-plated or gold-coloured centre hour and minute hands with white luminous compound
Rhodium-plated or gold-coloured seconds hand
Big date dial aperture at 2 o’clock
Power reserve indication between 7 and 8 o’clock

Case
Polished stainless steel tonneau shaped case with decorative pattern on either side
Length: 53.3 mm; width: 38.5 mm; height: 13.25 mm.
Scratch-resistant, anti-reflective sapphire crystal
Case back secured with sapphire crystal opening, secured by four screws
Water-resistant to 30 m (3 bars)

Bracelet
Brown, grey or black Louisiana alligator leather strap with polished stainless steel folding clasp.

References
7720.41.13.1229: Polished stainless steel case, Silver dial with centre cobbled-pattern structure and sunray brushed, Brown Louisiana alligator leather strap
7720.41.53.1231: Polished stainless steel case, Grey dial with centre cobble-pattern structure and sunray brushed, Grey Louisiana alligator leather strap
7720.41.43.1228: Polished stainless steel case, Black dial with centre cobble-pattern structure and sunray brushed, Black Louisiana alligator leather strap

Retail price
CHF 11’950/ € 8’530

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.