VOSTOK AMFIBIA AUTOMATIC DIVER WATCH. BOX+PAPER. 

Classic Vostok model made by the official supplier of the Defence Department of the Soviet Union and modern Russian Army.

Model number 710916
Condition is "New with tags". 
Dimensions: approx. 41x48x15 mm. Lug size 22mm
Mechanical mechanism "Vostok 2415.01".
The number of stones is 31. 
Self-winding with a safety device against re-winding the spring. 
Central second hand. 
Anti-shock device of the balance assembly. 
Case: stainless steel (case, time disc, crown, watch back). 
Organic glass. 
Water resistance: 20 atmospheres (200 meters). 
Stainless steel bracelet. 
Energy reserve of one spring plant is at least 31 hours. 
Average daily rate: -20 ... +60 seconds per day. 
The average service life of the mechanism is 10 years.

Watch care


Mechanical watches, like any mechanisms, require regular checking, cleaning, lubrication and adjustment of the accuracy of the movement. It is advisable to do this once every three to four years at an authorized service center indicated in the list attached to the watch passport. This is an important condition, since when the case is opened, even the smallest speck of dust that gets into the mechanism can disrupt the accuracy of the watch due to increased friction. Wind the watch only by removing it from your hand. This eliminates uneven pressure on the crown, which is one of the most vulnerable watch components. Manually wound watches must be wound at the same time by turning the crown clockwise until it stops. An automatic watch, if you wear it every day, should be wound once a week (20-30 rotations of the crown clockwise). Wearing a mechanical watch is not recommended for extreme sports, working with a breaker tool, etc. The recoil force experienced by a watch affects its durability and accuracy. No matter how perfect the shockproof mechanism is, there is always the possibility of excessive load that the parts of the mechanism may not withstand.


In order not to damage the calendar mechanism, you should not change the date between 22 and 02 am. At this time, all the gears begin to move to automatically change the date. Preferably, the date should be changed by first moving the hour hand to the lower sector of the dial (for example, to the <6 o'clock position>).


Storage


  It is advisable to store watches separately from jewelry, especially with precious stones, and in places where they will be subject to minimal friction against anything. The best option may be the box in which the watch was sold.


Replace broken or cracked glass immediately, as a hairline-thin crack will allow dust particles to enter the mechanism, affecting the watch's accuracy. It is not recommended to store watches in cold rooms. In the cold, lubricating oils thicken, the mechanism stops, and the axle journals can be damaged. Watches should not be left on stone tables, such as marble, as the strong temperature changes that marble is subject to can cause damage to some parts, especially the springs and spirals of older watches that were made of stainless steel. It is recommended to remove the watch before going to bed. While you sleep, you make uncontrolled movements that can damage your watch. In addition, a person sweats while sleeping, and sweat, gradually accumulating on your watch, can damage the case and gaskets that ensure the watch's seal. If your watch is waterproof, you can wipe it down from time to time with a mild solution of mild soap or cleaning agent, after which the watch should be dried. If your watch has a leather strap, then this procedure should only be carried out on the watch case. If your watch is not waterproof or you are not sure about it, wipe it with a slightly damp cloth and then dry it dry. If you regularly play sports or lead an active physical lifestyle, then you need to choose a watch with a metal bracelet or polyurethane strap, instead of a natural leather one. Sweat and perspiration released during sports will gradually destroy the natural leather of the bracelet.


Recommendations


It is not recommended to wear the watch in saunas, steam baths or under hot showers. Excessive heat and moisture can damage the watch case and seals.


Salty seawater damages the finish of most watches. Therefore, even waterproof watches should be washed with a soapy solution in warm running water after sea swimming to avoid corrosion and premature aging of the seals. During contact with water, the crown and all available buttons must be in the screwed-in position.


After 2-3 years, your watch may lose its seal due to aging of the gaskets. Therefore, it is necessary to check the tightness every two to three years and, if necessary, change the gaskets. It is not recommended to leave the watch near speakers or other sources of magnetic fields. Most watches do not have magnetic protection, and when parts of the watch mechanism are magnetized, they may begin to lag or, conversely, move faster.