How to know wristwatch's error

Watch the travel time error caused by the gravity effect, and the factory calibration of the movement, the individual wearing habits, the ambient temperature changes, movement of material, table oil quality will increase or decrease the objective conditions gravity on the accuracy of travel time effects. The world is not entirely accurate mechanical watches, mechanical watches with quartz accuracy can not be compared. Some friends say that their mechanical watches in a period of time can quite true or error is small, which is actually a day to wear different directions cancel each other under the positive and negative results. The quality of a watch to judge should look at the stability of travel time it should not be excessive pursuit of zero error. Such as a month on average almost five seconds off the table every day, that it is error of 2 points a month and a half, many of my friends think that the general accuracy of this table, in the eyes of experts, it is indeed a good stability of the table , compared to those in the normal case wear tomorrow, but today's fast-slow 2 seconds 3 seconds better than the quality of the table.

What is normal wear? About the same time you get up every morning wearing a watch, the unit normal work day off from work to home to the table, according to your usual habits of the table on the table in the box, repeat the same steps the next day called normal wear. If you brought today, tomorrow, without a break, it is not normal wear, in which case the error table will change because of wear conditions change, but can not say that it changes the stability of the movement, because the stability of comparison made in the same circumstances, I believe this point the Swiss chronometer testing to understand the way friends should be very clear. I consulted a senior repair master table, when he thought to go unstable if the case, for example, under normal wear conditions, watch a few seconds there tomorrow, but today's fast-slow case of a few seconds, the movement of oil may occur changes need to wash up or watch the oil by a magnetic. He also said that whether or chronometer tourbillon is a margin of error, they are more than ordinary table advantage is that the conditions laid down in the normal wear when the stability, the basic error of the difference a day can be less than 1 second, excessive pursuit of mechanical stability of the error is not a lot of attention to the error table fans, should not be advocated. Finally, under the watch movement, said teething problems, I've always thought that when the new tables go quickly is good, with a period of time the watch had a run-in period will be more accurate, but in fact this is a misunderstanding. Watch is not a car, precision machinery, spare parts are not allowed any glitches, and did not need running. Create a new watch to wear away after a period of time-varying accurate because the wearer has formed a habit of wearing, the objective of wear produced a relatively stable environment, the watch worn in different directions under the error of plus or minus offset and bring more to wear quasi-feel it.