Το ακρυλικό είναι ένα είδος πλαστικού που χρησιμοποιήθηκε για την κατασκευή κρυστάλλων πριν γίνουν διαθέσιμα σκληρότερα υλικά όπως το συνθετικό ζαφείρι και είναι παχύτερο και εύκολο να χαραχθεί.
Ηχηική σήμανση που χρησιμοποιεί ήχο και μερικές φορές δόνηση για να ειδοποιήσει τον χρήστη σε προκαθορισμένο χρόνο. Τις περισσότερες φορές βρίσκεται σε ρολόγια χαλαζία, αλλά περιστασιακά και σε μηχανικά.
Each clockwise and anti-clockwise turn of the balance wheel travels through a set angle of rotation - this angle is called the amplitude, and is set between 275 and 315 degrees.
A watch that has both analogue displays (hands) and digital displays (numerals). Often powered by quartz movements, but there are odd exceptions.
The practice of adding an angled chamfer to the edges of plates and bridges for decorative and functional purposes. Functionally, it removes sharp edges, preventing damage during service and thus eliminating debris falling into the movement.
The cut-out in the dial used to view the date wheel.
A movement that can be wound both with the crown and by an oscillating weight that spins with the movement of the wearer's wrist.
A wheel around a centimetre in diameter set with a hairspring. It is part of the escapement and helps to feed power from the mainspring back into the movement in controlled, regulated bursts by spinning repeatedly clockwise and anti-clockwise.
The stubby cylindrical container in the movement that houses the coiled mainspring. Some watches only have one, some have more, usually indicating a higher power-reserve.
The foundations of the movement onto which the rest of the movement is attached. The dial is mounted on the underside.
A matt finish achieved by firing many tiny glass beads at high pressure.
Each rotation of the balance wheel, either clockwise or anti-clockwise, is one beat. The average mechanical watch oscillates at around 28,000 beats per hour.
The practice of adding an angled chamfer to the edges of plates and bridges for decorative and functional purposes. Functionally, it removes sharp edges, preventing damage during service and thus eliminating debris falling into the movement.
The protective metal ring around the edge of the watch crystal that can be removed from the case for repair or replacement. Some bezels have the ability to rotate in either one or both directions as a timing or time zone function.
Steel can be decorated and protected against corrosion using a technique called 'bluing,' which turns it blue. It can either be done by using the traditional method of heating or the more recent method of chemical treatment.
The base of the movement onto which the rest of the movement is attached. The dial is mounted on the underside.
Beats per hour. Each rotation of the balance wheel, either clockwise or anti-clockwise, is one beat. The average mechanical watch oscillates at around 28,000 beats per hour.
A watch strap comprising of a chain of linked solid pieces, usually made from metal.
The outer-most coil of the balance wheel hairspring is twisted back over the top of itself and pinned half way along the width of the coil. This is to prevent deformation of the spring during expansion and contraction to keep an even and stable oscillation. Invented by Abraham Louis Breguet.
A plate secured to the movement by at least two screws.
A finish achieved using spinning brushed wheels of varying grades - appears as many fine scored lines over the finished surface.
A hinged pin retainer used to latch one end of a strap to the other.
The Contrôle Officiel Suisse des Chronomètres, the Official Swiss Chronometer Testing Institute that independently verifies the accuracy of tested movements.
A complication that displays the date, day, month and sometimes, year.
A specific model or design of movement.
The housing in which the movement, dial and hands are contained, usually made of metal.
The push-fit or screw-down cap on the rear of the case. Often fitted with a display glass to view the movement through.
The middle section of a three-piece watch bracelet link.
A spacer used to fill the vertical void between the edges of the dial and crystal, often with minute markers applied to it.
A complication that allows the user to measure a specific period of time from zero.
A movement that, when tested by an independent official body, falls within the accuracy parameters set by that body.
A secure folding system used to fasten a bracelet together, usually made of metal.
A type of escapement patented by the late George Daniels in 1980 that considerably reduces friction and the need for lubrication.
A cantilevered metal plate secured to the movement at one end only.
A wheel found in chronographs whose shape is like that of a castle turret. More difficult to make than a standard lever or cam mechanism, a column wheel coordinates the engagement of the chronograph using gear meshing rather than vertical friction.
A function in a movement. Complications vary from simple - time and date for example - to complex, like a perpetual calendar.
A type of decoration often found on movement plates, usually consisting of tightly packed curved lines engraved along the length of repeating thick strips.
The knob used to control the movement from the outside of the case for time and date setting and movement winding.
Distended shapes protruding from the case that protect the crown from being knocked.
The clear glass that allows the user to see the dial. Older watches will have a crystal made from acrylic, newer ones from mineral glass or synthetic sapphire.
A half-way house between a rectangular case and a round case.
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