The first improvement concerns the winding crown of the watch. Normally the winding crown is used to reset the watch and has the logo of the brand externally applied to the crown. This may involve some drawbacks including the dissection, in case of plastic materials of the logo, and the fact that it is not guaranteed perfectly vertical position of the mark when the crown is screwed at the stroke end against the case. To overcome these problems, Sea-God has patented a system of precision and high reliability, which allows the crown of the watch to stand in a vertical position each time it is unscrewed and used. This patent allows replacing with extreme ease the effigy in case of wear, thanks to the coupling bayonet between the disc-shaped element that supports the logo and the opening defined in the crown.