Mauron Musy

The armure reveals a new face

steel armure anima



It took us three years of research and development, backed by unfailing optimism and tenacity, to develop the nO-Ring® technology. A truly disruptive innovation, this patented system relegates O-ring seals to the rank of historical curiosity. Based on the principle of mechanical sealing technology, this 100% Swiss Crafted device guarantees absolute security while avoiding the need for costly recurrent maintenance service. The watch industry had seen no significant breakthroughs in this field for over 130 years.

Eric Mauron

Mauron Musy

Christophe Musy

Mauron Musy
Mauron Musy


Mauron Musy

the ultimate watch conception

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Mauron Musy

Our timepieces are
100% swiss crafted

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The nO-Ring® technology combines three principles: mechanical sealing technology, the clamp brace, and the satellite compression spring. A knock-on solution whose brilliance lies in miniaturising and adapting this device to watchmaking: a world first and a true paradigm shift in the field of containment, propelling the mechanical function of water resistance to the status of “watch exterior complication.”


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Mauron Musy - NO-RING®
Mauron Musy - NO-RING®

and Satellite

Mechanical sealing technology must nonetheless be adapted: it is impossible to use clamping screws in watchmaking due to the risk that the latter might deform certain components. They are replaced by extremely specific clamp braces: the sapphire crystal and caseback on the one hand; and the caseband on the other. These clamp braces tense the various elements by means of specially developed satellite compression springs. If a water molecule were the size of a golf ball, it would have to travel 430km and face 3m-high hurdles in order to infiltrate the case.

Mauron Musy - NO-RING®
Mauron Musy - NO-RING®

mechanical sealing technologyGlass, Caseback and Ring

Mechanical – or direct –sealing technology consists of hermetically fitting various elements together without any gaskets. This technology calls for serious knowledge of materials physics and fluid dynamics. It requires hardening and then straightening or grinding of the materials in contact so as to achieve exceptional flatness and controlled roughness of the surface profile. Thus adapted to watchmaking, this approach entails standards governing the world of infinite smallness: if the surfaces involved were the size of an Olympic swimming pool, their relief would correspond to tiny waves measuring a third of a millimetre high.

Mauron Musy - NO-RING®
Mauron Musy - NO-RING®


The winding stem pivots inside a bearing screwed to the caseband. These two perfectly adjusted components with their nanometrically accurate fit ensure a gasket-free seal. In comparison with the diameter of the Channel Tunnel, the space between the two would amount to a third of a millimetre, the thickness of a business card. The same principle is applied to the pushbuttons.

Mauron Musy - NO-RING®
Mauron Musy

Calibre 39
65 Hours
172 components

This mechanical self-winding calibre is equipped with a Swiss lever escapement and endowed with a generous 65-hour power reserve. Its heart beats at a frequency of 28,800 vibrations per hour, (4 Hz), and the extremely high inertia of the movement (16 g/mm2) ensures an extremely precise and stable rate. The rhodium-plated Côtes de Genève motif and the exclusive engraved oscillating weight give it an aesthetic appeal that is both technical and pleasingly restrained.

Terms and Conditions of Sale

We recommend careful reading of all the following terms and conditions regarding sales and delivery.


These terms and conditions of sale and delivery apply to the sale and delivery of products offered on By ordering one of our products, you expressly accept the provisions outlined below.

To be deemed valid, any modification and every addendum to the general terms and conditions of sale and delivery must be expressly agreed in writing, including possible changes to these provisions.

Capacity to accept these terms of use:

You hereby confirm that you fulfil at least one of the following conditions, that you are over the age of 18, or that you are an emancipated minor, or that you have legal consent from a parent or guardian and that you are entirely able to subscribe to the terms, conditions, duties, claims, representations and warranties stipulated in these conditions of use, as well as respecting and complying with these conditions of use.


Clients can order using the “Purchase” tab. In this event, they will be redirected to the PayPal site. In line with the instructions provided online, they will be required to complete a form requiring details with regard to their identity and in particular their last name, first name, telephone number, postal, email and delivery addresses. Contractual information will be sent in a confirmation email.

Clients also have the option of ordering directly by email from by specifying the model, serial number, quantity and personal information (last name, first name, delivery address, billing address, e-mail and telephone number). An invoice containing the relevant bank details will be dispatched. Delivery will take place as soon as payment has been credited to the Mauron Musy bank account.

Mauron Musy retains the right of ownership of products until full payment has been received. No delivery under any circumstances will be effected without full payment.

Prior acceptance of the terms and conditions of sale

Every order placed on the site requires the express prior consultation of the terms and conditions of sale by the client by means of a box to be ticked on the acceptance window appearing during the order placement process prior to any payment. The present conditions of sale may be modified at any time. Nevertheless, the conditions of sale applicable to an order are those in effect on the day of placement of the relevant order.

Product description

Products available for sale on the site are represented by high-quality photographs and accompanied by a description of their essential characteristics. Products are described and presented with the greatest possible accuracy. Nevertheless, due to computer technology, articles delivered may sometimes present minimal differences, notably with regard to colour, in comparison with photographs on the website.

Price, shipping costs and payment

Prices displayed on the website are in Swiss francs (CHF). Shipping costs are complimentary. Costs related to processing the order may on the other hand be invoiced at the time of ordering through PayPal. Prices indicated on the site are indicative and may be changed at any time. Prices invoiced are those in effect on the date of confirmation of the order.

For countries all over the world to which Mauron Musy agrees to deliver products, orders are payable in Swiss francs (CHF). Should clients’ local currency differ from the currency in which prices appear on the website, the client’s bank will apply the exchange rate in effect on the day of the order (unless the exchange rates differ from those applied by the client’s own bank).

The contract only states the price of the object in question. The purchaser is responsible for paying VAT, customs duties and any possible other taxes in effect in the country of delivery. In order to avoid any errors occurring, Mauron Musy recommends that purchasers obtain all relevant information from the appropriate authorities. The seller takes no responsibility for non-compliance on the part of the purchaser with his or her legal obligations with regard to statutory requirements. Nor shall it be held liable for any reimbursement whatsoever of an object confiscated by the authorities of a delivery country or in the event of circumstances involing fortuitous events such as wars, riots, epidemics, strikes etc.


Delivery will be effected to the delivery address indicated by the client at the time of ordering. Shipping of parcels will be done in a secure manner via the Swiss Postal Service or, in the event of a foreign order, through an approved carrier.

Parcels must be signed for on delivery. These become the property of the purchaser once the latter has signed, confirming that he or she has received the parcel and checked that the latter is not damaged in any way. Should there be any signs of damage, the parcel must be refused and returned to the Swiss Postal Service or approved carrier.

In this event, clients are requested to contact Mauron Musy with immediate effect, either in writing or by email at stating their refusal and the reason therefore.

Only articles that qualify under the terms of the warranty may be returned for exchange. Articles must be returned intact and complete in their original packaging (with the labels stating their references), accompanied by the delivery note, within five days of reception of your parcel. Shipping costs related to the return are at your own expense.

Transfer of ownership

Mauron Musy reserves full rights to products sold until the entire amount owed by the customer within the framework of his or her order has been received. Nevertheless, risks related to loss, theft or destruction incurred during the period from delivery to transfer of ownership are at the client’s expense. Only the original owner of the goods may lay claim to these general conditions of sale.


All products for sale on benefit from a two-year warranty as of the the date of delivery. If, during this period, the article delivered turns out to be defective, you are entitled to request compensation by email from the following address:

Conditions of application as well as the list of exceptions that are not covered by the warranty can be found in your certificate of warranty.

The warranty does not apply to certain cases:

Damage caused to external parts or to the movement resulting from abnormal usage, accidents, shocks, blows or accidental falls, improper, incorrect and excessive handling or operation, including dents, marks from blows, scratched or broken crystals, a scratched case, a twisted crown or push-piece, exposure to powerful magnetic fields and to corrosive products or solvents, detergents, perfumes, cosmetic products, prolonged exposure to the sun, etc.

Ageing, normal wear of crystals (scratches, splinters), of steel or its finishes, alterations of the colour of leather or rubber straps or steel bracelets.

Any deterioration resulting from repairs not conducted by one of our dealers or at one of our workshops as well as opening, repair or maintenance done by an unauthorised person.

Wear and tear of leather, rubber or fabric straps or steel bracelets.

Theft or loss of the watch or parts thereof.

Incidental or consequential damage resulting from use of or inability to use this watch.

Water-resistance is guaranteed on condition the crystals, bezel, case-back, body and crown are not damaged in any way.

For any repairs or maintenance outside of this two-year warranty period, we suggest you contact our customer service department or our official agents, the latter being particularly up-to-date with regard to our techniques.

Finally, we are in no way responsible for “remedying” any apparent defects that buyers think they perceive but which do not correspond to any actual flaw.

In order to benefit from this international warranty, the duly dated warranty card registered by us is required.

Data protection

Mauron Musy uses information and personal details provided by the client while using the website to the extent that the latter are required for the supply of related services, such as processing an order, product delivery and settlement proceedings, or in the performing of statutory duties, or in the event of the client having given his or her consent.

Safeguard clause

Should certain provisions of these conditions of sale and delivery become null and void, invalid or inapplicable, the validity or legal enforceability of the other provisions remains unchanged. Should a situation of this nature occur, the parties will agree to a valid and enforceable provision which will be as close as possible from an economic standpoint to the provisions declared null and void, invalid or inapplicable.

Customer service

For any questions regarding orders placed on the website, clients can contact the customer service team by email at

Applicable law and place of jurisdiction

The terms and conditions are subject to Swiss law. Any litigation related to these conditions of sale and delivery will be settled by the common courts of the Canton of Fribourg.

Most recent update: 18/05/2017