The high-density 904 steel imported from Germany is used to solve the problem of those who are allergic to the watch. The shell is made of a CNC machine and is carved with a high-gloss diamond knife. The mirror is made of natural sapphire a transparent blue anti-glare film and the bottom cover is CNC-processed at high speeds. The multi-faceted sun pattern surface is carved out, and the concave font is repeatedly pressed by a heavy-duty hydraulic press to form a fine and clear font.