1. Open the Back of a Seiko Watch
First, we will need to remove the back of your Seiko. Most Seiko watches generally have a back case with multiple indentations. You’ll want to use an adjustable watch case opener to safely open your watch.
Adjust the size of the watch opener to fit around the back shell of the watch. Line up the nobs with the indentations of the case, and twist the cover off.
If your watch only has one small indentation on the back case, it’s likely a hinge case. You’ll need to use a common cover remover, insert the edge into the slot, and lift the case up.