Gently place the watch insert into the case from behind. Make sure the crown stem is aligned correctly so it fits into the cut-out on the side.
Put your watch on a flat surface, dial facing upwards. Place the top ring over the dial and line it up so that all the watch face is visible.
Screw the top ring in place on the dial container. Be careful not to over-tighten it.
For classic two piece straps, attach each strap by inserting the push pins on the end of the strap into the small holes in the case.