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S
Term
Definition
Sapphire CrystalHighest quality transparent that is scratch resistant under normal conditions.
 
Sapphlex Crystal (Seiko Watches)Highly scratch resistant crystal created by the fusion of sapphire and mineral glass crystal.
 
Screw-Down Locking CrownA crown that aids water resistance by sealing to the case of the watch.
 
Second Time Zone IndicatorAn additional dial that can be set to the time in another time zone. It lets the wearer keep track of local time and the time in another country simultaneously.
 
Self-WindingThis term refers to a mechanically powered watch that is wound by the motion of the wearer's arm rather than through turning the winding stem.
 
Shock ResistanceSpecified on a watchcase, it means that a watch can withstand normal wear and tear, even during strenuous sport activities.
 
Slide Rule BezelA rotating bezel around the outside edge of the watch case that is printed with a logarithmic scale and assorted other scales and is used in conjunction with fixed rules of mathematics to perform general mathematical calculations or navigational computations.
 
Solar TechSolar powered quartz watch. This technology provides the accuracy of quartz, without the inconvenience and cost of regular battery changes.
 
Solar-PoweredA type of quartz movement where the batteries are recharged via solar panels on the watch face. They have a power reserve so they can run even in the dark.
 
Split SecondA feature on a chronograph that actually is two hands, one a flyback, the other a regular hand. To time laps or different finishing times, the wearer can stop the fly backhand independently while the regular hand keeps moving.
 
Stainless SteelAn extremely durable metal alloy that is virtually immune to rust, discoloration, and corrosion; it can be highly polished, thus resembling a precious metal. Because of its strength, stainless steel is often used even on case backs on watches made of other metals.
 
Sterling SilverA white and highly reflective precious metal. Sterling refers to silver that is 92.5 percent pure, which should be stamped on the metal, sometimes accompanied by the initials of the designer or country of origin as a hallmark. Although less durable than stainless steel and other precious metals, sterling silver is often employed in watches that coordinate or look like sterling jewelry. A protective coating may be added to prevent tarnish.
 
StopwatchA watch with a second hand that measures intervals of time. When a stopwatch is incorporated into a standard watch, both the stopwatch function and the timepiece are referred to as a "chronograph."
 
StrapA watchband made of leather, plastic, fabric or other non-metal material.
 
SubdialA small dial used for any of several purposes, such as keeping track of elapsed minutes or hours on a chronograph or indicating the date.
 
Swiss A.O.S.C. (Certificate of Origin)A mark identifying a watch that is assembled in Switzerland with components of Swiss origin, primarily used in Bedat watches.
 
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