https://en.wikipedia.org/wiki/PRIM_(watches)

PRIM is a Czech trademark for a range of watches. The brand is now being used by the two Czech watches manufacturers.

In 1949, the subsidiary of company Chronotechna Šternberk was established in Nové Město nad Metují, specializing in the production of personal watches (wristwatches and pocket watches). The first prototype watches were made in 1954 and were marked 'Spartak', the 'PRIM' brand was registered in 1956, the serial production started in 1957, thus Czechoslovakia has become one of only twelve countries in the world capable of producing wrist watches. It was the only manufacturer of watches in Czechoslovakia, reaching about half a million watches produced annually just before the Velvet Revolution.

The Elton hodinářská manufacturer in Nové Město nad Metují always produced watches with this brand, but the brand itself, including the logotype, was owned by the parent company Chronotechna. Chronotechna was after 1989 privatized separately. However Elton had disagreements with the brand owner, Eutech company (successor of Chronotechna company), and Eutech in 2001 sold the trademark to MPM-Quality company. The legitimacy of the sale and use of the brand is subject to the long-standing lawsuits.

Elton hodinářská of Nové Město nad Metují manufactures luxury custom watches in the price from tens of thousands CZK and all parts are produced in the Czech Republic. MPM Quality of Frýdek-Místek assemble its watches from imported parts from abroad, which sells at more affordable levels.

MPM-Quality company uses the original logotypes (both older and newer than 1969) and Elton hodinářská uses the logotype 'PRIM Manufacture 1949' and the newer logo (since 1969).

Among users of Elton hodinářská watches are also Václav Klaus, Petr Čech and Alain Delon, as a gift of the Czech Government Office were received for example from Nicolas Sarkozy, Spanish royal couple, Angela Merkel, Barack Obama, Ferenc Gyurcsány, Robert Fico and Donald Tusk. Elton was a supplier to the Czech Olympic Team, the Czech Olympians equipped these watches for Olympics in London, Sochi and Rio de Janeiro. MPM Quality is a supplier to Czech Olympic Team from 2017-2020 starting with PyeongChang.

All Antique watches are mechanical. Many repairs will not be cheap, as most likely they will require replacement of non-standard parts (unlike most late model watches).

• Antique watches should not be beaten or dropped - because repairs may be expensive.
• Antique watches are generally NOT waterproof. This is because waterproofing was not in general production until the middle of the 20th century for most watches. Therefore you should protect your antique watch from exposure to moisture.
• If your watch becomes wet it should be dried off quickly. Carefully open all covers and use a hair drier to blow dry the movement, dial, covers, crown. This will reduce the amount of rust.
• If your watch becomes wet with any kind of salt water you should immediately immerse or spray your watch with fresh (no-salt) water to remove all the salt from the works before drying the watch completely. Any salt left in the watch will combine with moisture in the air to rust metal components of the movement, case etc.
• Winding any mechanical watch tight may break the mainspring. If you can avoid it do not wind the watch hard.
• When adjusting the hands of your watch, move them in a clockwise direction only. Counter-clockwise adjustments may damage the movement. It is desirable to adjust the hands of your watch at the same time every day. An automatic or self-winding watch should be worn for at least 8 hours a day. It is a mechanical watch in which the mainspring is wound automatically as a result of natural motion of the wearer's arm, to provide energy to run the watch, making manual winding unnecessary.
• If you must adjust counter-clockwise make it for small adjustments only (i.e. for minutes, NOT hours).
• Be careful and gentle when adjusting the movement speed (faster or slower). Don't make sharp movements, and don't touch other components in the movement especially the pendulum mechanism.
• Every 2-3 years it is necessary to service and oil vintage watches. If the course of your watches is worsening and the accuracy of the reduction in the duration of the clock (autonomy) from one fully wound spring - it need a service.
• IF the watch is dirty - allow the watch to run down, don't wind it again until you have it serviced by a qualified watch repair expert. Dust will absorb and remove important lubricants and cause the movement pieces to wear down.
• To clean the case, dial and crystal you should use a cloth that does NOT leave fibers as these may get caught up in the movement. Check with your Watch repair expert to get an appropriate cloth.
• Keep your antiques watch away from magnets. Strong magnetic fields may affect the accuracy of your watch since some vintage watches were made with iron based components in the movement.
• Most Cases and Covers are fine components and will not handle abuse well. The watch should not be shaken, beaten, or stressed.
• Antique watches generally experience an error of up to 5-7 minutes a day. Any accuracy of +- 5 minutes is very good.
• Mechanical watch is not recommended to use for engage in extreme sports, and expose them to excessive vibration loads. Recoil force, which take on the clock, affect their reliability and precision. No matter how perfect was not anti-shock mechanism, there is always the chance of excessive load that details of the mechanism can not survive.
• Watch with calendar. It is not recommended to adjust, the date between 20.00 and 06.00, because at this time involved a mechanism for automatic adjustment date. Translation pointers calendars manually in this position arrows may damage the mechanism. Date changes should be made, relegating pre-clockwise to lower sector of the dial (for example, to position 6 (18.00) hours).
• Chronograph watches. In most cases, these watches contain the "start/stop" button and "reset" button. It is strongly recommended not to press the "reset" if the chronograph is running. Before you use the "Reset" button need to stop the chronograph by button "start/stop". Using the "reset" when running chronograph can damage the mechanism of most models of watches.

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