Everyday use
Will the power reserve last?
When did you take off the fully wound watch, and when will you wear it again? Calculate the break.
All dates and times use Uzbekistan time (UTC+5).
Preparing dates…
The calculation starts from a full wind. There is no additional winding while the watch is off your wrist. This is an estimate using the stated reserve: actual duration depends on the movement’s condition, surroundings and running complications. A partly wound watch may stop earlier.
What does power reserve mean?
It is the running time from a fully wound mainspring without further winding. Automatic winding replenishes energy through wrist movement, but a few hours of wear do not guarantee a full reserve. Use the value in the model’s specifications; use the lower figure if a range is stated.
Source: Seiko — winding mechanical watches