A common manufacturer of watches around the world, Seiko features a number of different watch models and brands. The Seiko Quartz features a snap back case that allows you to open your watch to make adjustments. If you need to remove the movement from the interior of your watch, you can complete the process in just a few minutes with some simple tools.
Place your watch in a holding vice or use something to hold it down firmly so that it will not move as you open the snap back.
Run a case knife or other small blade around the back of the watch to find a groove in the case to open the watch.
Pry the blade into the groove and use the blade to pry the back of the watch open. Do this by twisting the blade to pop the case open.
Use the tweezers to lift open the battery holder and expose the movement arms underneath. You can then remove the movement features by lifting them out with the tweezers.