A part, a timepiece, and a manufacturing method of the part capable of avoiding the limitations on the member which is used, expanding variation in the design, being easily manufactured, and improving the aesthetic appearance are provided. Packets are assigned priority levels, and the cross-bar switch regulates bandwidth allocation for each priority level. Each row of split louvers has louvers formed in pairs of adjacent, spaced louver banks extending across the width of the strip. Based on the signature, a secure communication path between the components may he established by creating an encrypted virtual private network.