Franck Muller Specialists

Franck Muller was born in Switzerland in 1958 to an Italian mother and a Swiss father, and he trained at the Geneva School of Watchmaking. Before putting his own name on watches he restored historic pieces for collectors and auction houses. The brand says he presented his first wristwatches in 1983, and that each carried a complicated movement he had developed himself. That early focus on complications is why the house is often described as a complications specialist, and why its catalogue leans toward movements with several functions.

The partnership with Vartan Sirmakes began in 1991, and it gave the business the commercial side that a young watchmaker needed. Sirmakes trained as a jewel setter in Geneva before moving into the watch trade, so the brand's early years mixed fine watchmaking with the skills of a workshop that understood gems and finishing. The Cintrée Curvex followed in 1992. It was a tonneau case curved in three dimensions, and the brand describes its manufacture as involving great technical difficulty. The dial had to be curved too, which is why its numerals are elongated and placed to follow the case.

The Vanguard arrived in 2014 and took the same curved idea into a sportier and more contemporary direction. It is a different family with its own movements and references, so the name on the dial doesn't tell you which caliber is inside. Both lines share a shape language that is easy to recognize and easy to copy, which makes the case and dial the first thing to check on any watch you are thinking of buying or sending away for work.

The brand publishes a clear description of a complete service. It covers dismantling and inspecting the movement, repairing or replacing components as needed, replacing the case seals, and running air-compression tests. The movement is then checked for power reserve, timing accuracy and operation in different positions, followed by functional and cosmetic checks. Franck Muller says the testing stage alone can take up to nine days, which is a reason to treat the whole turnaround as an open question until you have a written timeline.

Under warranty, the official route is through a Franck Muller boutique or an authorized retailer, and the brand's servicing page confirms a two-year warranty after a complete service. Watchland in Genthod houses the after-sales department, but owners are directed to the boutique network for maintenance and repairs. Ask for the full warranty terms in writing before authorizing work, including what counts as a complete service and whether minor adjustments or strap changes are covered.

Once a Curvex is out of warranty, an experienced independent can be a sound choice, particularly for a movement that is a common Swiss design. The thing to test is the case. Ask how the shop removes and refits the case, how it handles the curved crystal and gaskets, and whether it will protect the dial during reassembly. A shop that treats the case as a box with a movement inside will eventually cost you a crystal or a dial.

The movement is the easier part of the job, even if it is not simple. The Curvex range uses FM 2800 and FM 800 calibers depending on the reference. The 6850 SC, for example, uses the FM 2800-SC, a 4 Hz automatic with 42 hours of power reserve and 21 jewels, measuring about 5.35 mm thick. The 7851 SC DT uses the FM 800-DT, which is thinner at about 3.75 mm and adds a date. Franck Muller describes both as decorated, assembled and regulated in-house, and auction house catalogues tie some FM 2800 calibers to the ETA 2892 family. Ask a watchmaker which base caliber is in your reference before you agree on a plan.

The case is where a Curvex service can go wrong. A curved case and a curved dial leave less room for error when the movement goes back in. Check that the dial sits square, that the hands clear it, and that the crystal seats evenly against the gasket. After reassembly, an air-compression test shows whether the seals hold, and that test should be part of the written quote rather than an extra you have to request.

Water resistance on these references is listed at 30 meters, which is a figure for splashes and handwashing, not for swimming or diving. Ask for the pressure test result on the paperwork, and note it in your records so the next shop knows how the seals were last checked.

Start with the reference and the papers. The reference on the caseback, the box and the warranty card should all match, and the movement should be the caliber the reference calls for. A Curvex with a mismatched caseback or a movement that doesn't fit the reference is a sign that something has been swapped or repaired without a record, and the price should reflect that doubt.

Next, look closely at the case edges and the crystal. Polishing softens the lines of a curved case, and a crystal that doesn't sit flush with the case is a common sign of a previous repair. Check the dial for correct printing and for any uneven curve where it meets the case. Elongated numerals that are misaligned, or a dial that looks flat where it should curve, is worth asking about.

Ask the seller for every service invoice, and check whether the work was done by an authorized service center. Work done outside the network can void the brand's service guarantee, which affects what you can expect from the watch after you buy it. A pre-purchase inspection that opens the case, identifies the caliber and tests the seals gives you a report you can use either to negotiate or to walk away.

A good specialist for these watches is comfortable with curved cases, with thin movements and with gaskets that have to seat around a complicated shape. Ask how often the shop handles Franck Muller watches, and whether it can show you its work on another curved case. Experience in this brand is more useful than general prestige.

Get the quote in writing, with the movement, case and seals listed separately. Ask whether the shop will polish the case or the bezel, and whether it needs your approval before doing so, because polishing a curved case can change its outline. Also ask what happens to the old parts and whether you can have them returned.

For everyday questions, like battery issues on a quartz piece or a strap that needs fitting, a local watchmaker is a good place to start. Save the complete service and any warranty questions for a shop that will work to the brand's process, and keep the paperwork that proves who did the work.