G Watch R and Galaxy Gear S by LG Electronics and Samsung Electronics respectively were disassembled to see their structures. First of all, much of the internal and external design concepts were quite similar. Claiming to be the classical sports type watch, the G Watch R is a smart watch emphasizing the sense of watch rather than its diverse smart functions while Galaxy Gear S was produced with a design of fashion watch. From dismantling both products, it was revealed that for G Watch R, the plastic OLED display which corresponds to the plate of watch is attached to the glass of the watch as shown by removing the back plate by unscrewing from the back side just like a regular watch and internal components, but for Galaxy Gear S, the flexible OLED panel was attached to the front side with adhesive so that the window detaches as applying heat to the front side.