AUTOMATIC WATCHES_ACCURACY
Check the average deviation for accuracy
The accuracy of a mechanical watch is dependent on factors such as how tightly the mainspring is wound, the position of the watch, and the ambient temperature. Consequently, the product specifications may not include checking how much the watch’s accuracy deviates each day. But users do not need to check the “daily deviation”, or how much the watch’s accuracy deviates in a single day. They can simply check the average accuracy deviation over a period ranging from a week to 10 days.
When you are wearing a watch on your wrist or you place it on a table or desk, the accuracy of the watch varies depending on its orientation. However, any accuracy error can be minimized by keeping the mainspring tightly wound.
Tends to run slowTends to run fast* The above is only one example of how watches tend to run fast/slow. The tendency for accuracy to vary differs between models and even between individual watches.
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