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Our Service for your Mühle Watch

Our S.A.R. Rescue-Timer is a prime example of Nautische Instrumente Mühle-Glashütte and its many years of dedication to manufacturing time measuring instruments that faithfully serve their wearers over a long period of time. In order to ensure that our Mühle watches continue to work as well as they did on their very first day for a long time, even as long as 10 years, we only use high-quality materials and components in our manufacturing activities and process these parts with the utmost care. Nevertheless, in order to ensure the longevity of Mühle watches and their ability to retain their value, wearers also need to take proper care of their watch’s case and movement. You should also send in your watch to be serviced every 4 to 5 years so that its movement can be cleaned and given new oil and other maintenance work can be carried out.

Recommendations for Wearing and Caring for Your Mühle Watch

Servicing a Mühle Watch

Recommendations for Wearing and Caring for Your Mühle Watch

Like all mechanical watches also reliable Mühle watches like to be given a little love and care every once in a while. This area of our website provides a number of tips that you can use in order to easily preserve the function and value of your watch on a long-term basis.


We maintain our connection to our company’s nautical roots by placing particularly high value on the watertightness of our wristwatches. All Mühle watches in our current collection are therefore water-resistant up to a pressure of 5 bars or above, meaning that they can not only be worn when washing your hands, but also out in the rain.


Watches with a watertightness of 10 bars or above are also suitable for use when swimming, for example all of our Teutonia or 29er models. If you want to wear your watch when diving, however, it needs to have slightly more pressure resistance, with at least 20 bars required according to the standard DIN 8310. Our Rasmus 2000 and Marinus models have a pressure resistance of 30 bars and are therefore ideally suited for use when doing all sorts of sports both above and under water.


If you want to wear your watch underwater, you must ensure that you have pushed its crown into the winding position or, in the case of screw-in crowns, that the crown has been screwed into the winding stem on the case and tightened by hand. Only by doing so can you guarantee the watertightness of your Mühle watch!


You should also bear in mind that the pressure resistance information provided applies to brand-new watches. The watertightness of your watch may deteriorate over time as a result of knocks or blows and other factors such as solar radiation, contact with cosmetics and chemical reactions with adhesives or paints can also cause its seals to become permeable to water. We therefore recommend that you get the watertightness of your watch checked every 1 to 2 years.

Wasching your Hands, splashes

showers, baths, swimming

diving, snorkeling

Salt water

You should thoroughly rinse your watch in tap water after swimming or diving in the sea. We also recommend that you do so after sailing or surfing.

Leather straps

Leather straps should generally be kept away from water so that they maintain their shape and appearance over a long period of time. Our Russia leather straps have been specially treated in order to make them water-repellent and therefore ideally suited for use during outdoor activities. They should not, however, be worn when swimming or surfing.


Leather straps should generally be kept away from water

The Power Reserve and Winding Up Your Watch

The power reserve details provided for your Mühle watch are based on the remaining time for which it will run once it has been fully wound. Our chronograph mechanism, for example, has a power reserve of 48 hours when fully wound, meaning that a Mühle chronograph watch can be taken off and stored without being moved for 48 hours before stopping. If a watch does not receive enough energy through motion and is therefore not fully wound, it will stop earlier. You can additionally wind up your watch by hand in order to avoid this problem. You can reach your watch's full power reserve by putting its crown in the winding position and turning it 20-30 times.


Hand-wound movements: The "R. Mühle & Sohn" manufacturing line and the Teutonia III are equipped with hand-wound movements. Once fully wound, the watches have the power reserve listed in the technical specifications. In order to keep the watch from stopping, it has to be rewound by hand before this time expires. If you wear your watch on a daily basis, we recommend that you wind it up at the same time every day, preferably in the morning before you put it on.

Minimum power reserve: 38 hours

We recommend that you wind up your watch at the same time every day



Magnetic fields are not only present in close proximity to magnets, but also wherever an electrical current is to be found. Nevertheless, you can, of course, continue to wear your Mühle watch when travelling on the tram, drilling a hole in the wall with an electric drill or setting your radio alarm clock, none of which will affect your Mühle watch in the slightest. You should, however, avoid placing your watch on surfaces such as the loudspeaker of your hi-fi system or other electric devices or appliances. You should above all be sure to take off your watch before undergoing medical examinations in magnetic resonance tomographs (MRI/MRT scans) because these devices create extremely strong magnetic fields.



Don't place your watch on electric devices or appliances

Taking your watch off at night or when travelling:

If you prefer not to wear your watch during the night, you should try to avoid placing it on cold stone, glass or metal surfaces. Areas that reach extremely high temperatures are also unsuitable for the storage of your mechanical watch. If you want to take off your watch when driving a long distance, you should not place it on surfaces such as your dashboard.

Don't place your watch on cold stone, glass or metal surfaces

Areas that reach extremely high temperatures are unsuitable for a mechanical watch

Knocks and Blows

Mechanical movements consist of a large number of small cranks, screws, wheels and spindles that all work together with the lowest possible tolerances. Knocks and blows can impair the function of such a fine mechanism. As a result, your Mühle watch should be kept away from avoidable knocks and from regular blows in particular, for example those caused by chopping wood, even though our patented woodpecker neck regulation enables it to cope well with the odd knock and blow. By avoiding such impacts, you can not only protect the multitude of tiny components in your watch’s movement, but also prevent the appearance of ugly scratches on its case.

Protect your watch from avoidable knocks and regular blows


Your Mühle watch feels most at home when sitting comfortably on your wrist, where every motion provides our automatic watches with the required winding energy and your body heat constantly keeps them at operating temperature. If you take off your watch or switch between different Mühle watches every once in a while, you should ideally store your unworn watches in their cases or in a cabinet where they are protected against dust, moisture and direct solar radiation. When storing your watch for a long time, we additionally recommend that you wind it up by hand once a month so that the different oils are always properly distributed throughout its movement.

When storing your watch for a long time, we recommend that you wind it up by hand once a month

Protect your unworn watch against dust, moisture and direct solar radiation

Watch Winders

Watch winders are the ideal solution for the extremely convenient storage of Mühle automatic watches because they wind them up on a regular basis. When using a watch winder, you need to use the specific settings required for your watch movement in order to ensure that it is optimally wound:


MU 9408 and MU 9413: Both of these chronograph mechanisms are movements that are wound on one side. You therefore need to adjust the settings of your watch winder so that it turns your watch in a clockwise direction/to the right when you look at the face of the watch. Rotations per day: 750


Selitta, Mühle version: The SW 200/220/221/240/260/290/330/400 mechanisms are movements that are wound on both sides. Your watch winder can therefore be set to rotate clockwise or counter-clockwise, but where possible, should be set to rotate in both directions. Rotations per day: 725


ETA, Mühle version: The ETA 2671/2824/2836/2892/2893/2895 mechanisms are movements that are wound on both sides. Your watch winder can therefore be set to rotate clockwise or counter-clockwise, but where possible, should be set to rotate in both directions. Rotations per day: 650




It is normal for mechanical watches to display a certain amount of tolerance because fluctuating temperatures, the tension of the winder springs or the position in which a watch is stored when not being worn can all affect its accuracy. The accuracy of a new watch may, however, display deviations in the eight-week-long run-in period in particular. You should therefore wait until these eight weeks have passed before asking a specialist to measure your watch’s daily deviation and, where necessary, getting it adjusted.

Accuracy: between 0 and a maximum of +8 seconds a day

Servicing a Mühle Watch

Mechanical wristwatches provide maximum performance every single day. While you may only use your car for an hour to travel to work and the same length of time to return home every day, your wristwatch has to work around the clock. The balance of a Mühle movement completes a total of 691,200 alternations in any given 24-hour period, meaning that it is accelerated to top speed 691,200 times a day and stopped by the escapement just as frequently. These alternations put a huge strain on the movement, which acts as the engine of a mechanical watch. Despite such a strain, a Mühle watch only needs to ‘have its oil changed’ every 4-5 years.

The Complete Mühle Service

A Mühle service is like a rejuvenating cure for your watch, both on the inside and the outside. A case refurbishment, for example, can remove any scratches that may be on the case and professionally clean both the watch's case and its stainless steel strap. Despite the importance of your watch’s appearance, it is, however, a well-known fact that true beauty is found on the inside, which is why our Mühle service particularly focuses on the extensive maintenance of the movement inside your time measuring instrument. Our service aims to return your Mühle watch back to its original perfect condition. In order to achieve this, our service watchmakers carry out a multitude of different tasks:


  • Checking the case and strap
  • Removing the movement
  • Checking the winding mechanism, escapement, wheel train, motion work and calendar function
  • Fully dismantling the movement into its individual components
  • Cleaning the individual components in an ultrasonic bath
  • Checking all parts and replacing worn components
  • Assembling the movement and adding new oil or grease to all components
  • Regulating the movement in 6 positions
  • Checking all movement functions
  • Attaching the face and hands
  • Refurbishing the case
  • Replacing the crown, winding stem and all seals in order to ensure perfect watertightness
  • Fitting the movement back into the case
  • Having the watertightness, accuracy and power reserve of the watch tested by the service watchmakers responsible for the watch
  • An independent final examination carried out by a Mühle master watchmaker


Once a watch has undergone the complete Mühle service, it is as good as new and yet again ready to face the minor and major challenges that you will set it over the next 4-5 years. This is confirmed by the 2-year guarantee that we provide as an affirmation that your watch is working perfectly again.

Service Enquiries

Would you like to have your Mühle watch professionally serviced? If so, please contact your nearest specialist Mühle retailer, who will not only provide you with competent advice but will also easily and conveniently take in your watch and arrange for it to be serviced.


You can also choose to bring your Mühle watch to be serviced at one of Service Centres, which are located all over the world and run by a variety of specially trained Mühle partners. Please feel free to contact us in order to request more information about the Service Centre responsible for your country by simply sending an e-mail to: