• BLUING STEEL

    Oxidation of a piece of steel by heating it to give it a more or less dark blue color. Bluing is an industrial process that is commonly used in horology. When the steel cools down at the contact of air, a fine layer of calamine will form, which will protect it from oxidation. Blued steel is frequently used on the hands of steel watches. Blued steel inspired the hand of the TIEFENMESSER, following the codes of the world of submarines.

  • 316L STAINLESS STEEL

    316L steel is a steel alloy that contains iron and carbon, to which is added chrome that forms a protective layer of chromium oxide, which makes the watch stainless. It is frequently used to make the cases of high-end watches. 316L stainless steel is used for all the cases of RESERVOIR watches in steel.

  • VIBRATION

    The movement of the regulating body in one direction, which is limited by two extreme positions. The vibration frequency is usually expressed in vibrations per hour. The oscillation, on the other hand, represents the back and forth movement of the regulating body. In other words, an oscillation equals two vibrations. RESERVOIR watches’ movement has a vibration of 28.800 vibrations/ hour.

  • HAND

    The hand is a long and thin piece of metal that moves around the dial of a watch and serves as an indicator of time. Most watches have three hands that indicate hours, minutes and seconds. The minute hand rests on the cannon pinion, which is fixed to the minute wheel shaft. The unique hand on RESERVOIR watches is that of the minutes. It is a retrograde hand that comes back to zero after each hour.

  • “FEUILLE” HAND

    The “feuille” hand is a hand in the form of a leaf. In the RESERVOIR collection, this hand is displayed on the dial of the Supercharged.

  • SWORD HAND

    A sword hand is a hand that is inspired by two-edged swords. A symbol of war and battle, this model strongly influenced the hand of the AIRFIGHT watch.

  • BUTTERFLY CLASP

    A butterfly clasp is a type of closing buckle on the bracelet of a watch. It is articulated and unfolds when it is opened. It can be opened and closed thanks to a pushbutton. If the butterfly clasp accidentally opens, the watch will stay on the owner’s wrist without falling off. The owner only has to close the buckle of the bracelet. Depending on the model, the clasp can have a different shape or size. The bracelets of RESERVOIR watches have butterfly clasps in steel, in black PVD or in titanium depending on the models.

  • BRONZE

    copper and tin allow. Bronze is a material that resists well to wear but resists mildly to corrosion; it is very elastic and can easily be shaped. Bronze is an alloy that is particularly appreciated in watchmaking, because the patina it gains over time gives it a unique aspect. In the RESERVOIR collection, you will find this material on the TIEFENMESSER, which pays tribute to vintage brass depth meters.

  • DIAL

    Time is displayed on the dial of a watch. The dial is a disk on which the numbers are inscribed. In general, watches only have a single dial for all the different types of information that are displayed, often made of brass. At RESERVOIR , we design each dial as a tribute to a specific world of inspiration.

  • CASE MIDDLE

    The case middle is a part of the case of a watch. The case, which houses the dial, the hand and the mechanism, is made of three different units: the bezel, the case middle and the case back. The case middle is located between the case back and the bezel. It is the main piece of the case.

  • MAGNETIC FIELD

    Particular state of space next to a magnet. Automatic watches are vulnerable to magnetic fields, which can alter the mechanism.

  • CHROMIUM

    A hard and brittle metal with a metallic grey color. It is also a refractory metal that is extremely resistant to heat. Chromium is widely used in the automobile industry not only to cover metal objects to protect them from rust and wear, but also for its aesthetic appeal. The polished bezel of the SUPERCHARGED watch is inspired by this element so characteristic of English cars of the 1930’s.

  • WINDING CROWN

    The winding crown is a knurled or fluted button of various shapes that is fixed to the winding stem on the side of the case. Held between the thumb and forefinger, it allows putting tension in the spring. Thanks to a commutation mechanism, the winding crown can also be used to set the time. The term “crown” is used because of its knurled shape.

  • SCREW-DOWN CROWN

    A screw-down crown is a part that is used to set the time and rewind the mechanism. This crown is self-locking and is screwed in a tube of the watch’s case. A screw-down crown is a guarantee of reliability and sturdiness and contributes to the watch’s resistance to water. All RESERVOIR watches are equipped with a screw-down crown.

  • COMPLICATIONS

    Complications are mechanisms that are added to the primary movement of a watch to indicate more information, in addition to hours and minutes. Such watches are referred to as “complicated watches” or “watches with complications”. A watch can for example be equipped with an alarm, different kinds of ringtones, a perpetual calendar, a tourbillon, different time zones, or a chronograph. A watch can have one or more complications. Some high-end models integrate very sophisticated complications such as sidereal time or a celestial map. An additional horology module has been developed and patented for the RESERVOIR collection, which allows the display of three complications: a jumping hour, a retrograde minute and a power reserve.

  • COUNTER METER

    A meter is a tool designed to measure a quantity or dimension in a defined unit of measure, with a function allowing counting and recording specifically in watchmaking. A chronograph meter is a mechanical device that displays the number of rotations reached by the hand within the watch dial. The sports meter, on the other hand, has a larger central hand as part of its mechanism which can progress by gaps of 1/5th, 1/10th or 1/50th of a second, as well as a smaller hand which tracks minutes.

  • CRYSTAL

    A crystal is a kind of very pure and translucent white glass, containing potassium and lead oxide. It is used to create luxury glassware, including watchmaking lenses and glasses.

  • RUNNING TIME

    Length of time during which the watch is able to function, from the moment the spring is completely extended until it is fully released.

  • WATER RESISTANCE

    Water resistance describes a watch’s ability to not let water in. In watchmaking, the joints and seals are conceived to prevent water and humidity from seeping into the case. A watch’s water-resistance is measured in meters or bars, but can also be measured in ATM (atmospheres). A watch with the “water-resistant” mention must answer to the NIHS 92-10 norms: it can be in contact with water in everyday activities (showering, doing the dishes) but cannot be used for a long time underwater. However, a diving watch has a water resistance that answers to the NIHS 92-11 norm that allows it to go up to 100 meters depth. All RESERVOIR watches are water resistant to 50 meters (5 bar/ 5 ATM).

  • CASE BACK

    The case is made of three distinct parts: the case back, the bezel and the case middle. The case middle houses the movement while the bezel protects the caliber. The case back is at the opposite of the bezel and supports the entire movement. Usually opaque, it can be transparent to show the movement. It can sport all kinds of decorations and information on the watch. On RESERVOIR watches, the back has a 240° opening that reveals the beauty of the movement.

  • FREQUENCY

    The frequency corresponds to the number of oscillations during a certain period of time, measured in hertz (oscillation/ second). In horology, the number of vibrations of the regulating body is measured in hour (vibrations/ hour). The balance of a mechanical movement usually completes 18 000 vibrations/ hour.

  • GMT

    Abbreviation for Greenwich Mean Time, which is the solar hour at the Greenwich meridian. It is the reference time at the global level. In horology, a GMT watch is a watch that allows the display of an additional time zone.

  • APERTURE

    An aperture is a small opening in the dial of a watch. It allows displaying a time unit thanks to a rotating disc on which numbers (hours, minutes, date) or words (days of the week or months) are inscribed. RESERVOIR watches display the hour in an aperture located at the center of the dial, under the minute’s hand.

  • JUMPING HOUR

    Display of the hour through an aperture and whose change every 60 minutes happens suddenly with a jump. A watch with a jumping hour does not display hours with a hand. It is fitted with a small opening located on the dial of the watch and in which the number of the hour is displayed. At each change of the hour, the number displayed gives way to the following. Watches with a jumping hour are very often mixt: the hour is displayed by a number while the minutes and the seconds are displayed by classic hands. The jumping hour is a prized watchmaking complication, and an iconic complication of the RESERVOIR collection.

  • INDEX

    Generic term for a time display device, on which a hand turns around an axis and points to a measure on a circular arc. As such, the hands of a watch are indexes. The hand can also be fixed, and in that case it is the disc that pivots.

  • OSCILLATING MASS

    An oscillating mass is a component that can be found in the winder of an automatic watch. Also called rotor, this device can have the shape of a semi-circular disc that turns freely to wind the calibers’ motor spring. The oscillating mass of an automatic watch is often made of gold, platinum or tungsten carbide. Thanks to the case back’s 240° opening, it is possible to see the oscillating mass of a RESERVOIR watch.

  • MODULE

    Module is an expression that comes from the domain of electronics that designates, in horology, a component or an independent mechanism affixed to the movement, which functions with it without any new pieces being added to the movement. The patented 97 pieces module developed by RESERVOIR allows the display of three watchmaking complications: a jumping hour, a retrograde minute and a power reserve indicator.

  • OSCILLATION

    The regular movement carried out by a body between two determined limits, as a consequence of a vibration. In horology, it is the vibration of the regulating body (balance wheel, pendulum, quartz) from one extremity to the other, and so on and so forth. One oscillation is equivalent to two vibrations.

  • DEPTH METER

    A depth meter is an instrument used by divers and submarines to know at any moment the depth at which they are. It is an essential measure for their survival and security in a hostile environment. Divers wear their depth meters attached to their wrist thanks to a simple rubber bracelet, just like a watch; Submarines are equipped with depth meters located in the machinery room. The TIEFENMESSER, which means depth meter in German, is inspired by these vintage meters found above submarines.

  • QUANTIEME

    Describes the display of a date on the watch. A number of RESERVOIR models currently offer this reading of the date on its dial.

  • RETROGRADE

    The retrograde is a hand that can usually be found on small dials on watches. Their specificity is to come back to their point of departure once they have covered the entire scale. The retrograde assumes its initial position and starts a new cycle, doing so perpetually. This hand is notably present on timepieces that display, in addition to the time, the days of the week or months and seasons. Such watches are referred to as watches with a retrograde hand. On certain watches, the dial and the display of the hour are counter-clockwise; the hands thus turn towards the left. This organization, which is called a retrograde display, exists also on the sectorial display of the hour or of the calendar. On so-called retrograde displays, the hands describe a circular arc before instantaneously coming back to their initial position to start a new cycle. This unceasing back and forth allows to create innovative and spectacular dials. Reservoir proposes a retrograde minute that describes a 240° course going from zero to sixty minutes.

  • POWER RESERVE

    The power reserve indicates the functioning time of a mechanical movement without it needing to be rewound. The display of the power reserve is represented by an auxiliary dial, which we find primarily on high-end automatic watches. The power reserve indicator can be found on all the watches of the new RESERVOIR collection, with a design inspired by vintage gauges.

  • SUPERLUMINOVA

    The index and the hands can be covered with a Superluminova treatment for a better readability in the dark or underwater. In the RESERVOIR collection, only the AIRFIGHT model displays Superluminova index.

  • TITANIUM

    A very light metal, titanium is also very strong and magnetic. It has an elevated melting point (around 1800°C). It gets its grey color from a layer of oxidation (anodization). Titanium is used in aeronautics and in the military industry, in particular for missiles; In horology, titanium is used more and more frequently for the cases of watches because of its lightness, its durability, its comfort around the wrist and its esthetic.

  • SAPPHIRE GLASS

    Sapphire glass is a material used traditionally in horology. It is adjusted to fit the bezel of a watch, a chronograph or a clock to protect the mechanism and the hands from shocks and dust. Sapphire glass is very much appreciated by watchmakers because it is very resistant and practically unscratchable. In certain luxury watches, sapphire glass is also used to cover the case back, creating a kind of window open on the mechanism. Reservoir watches are equipped with a sapphire glass on the front to protect the dial and the back to let the movement appear.

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