To provide a timepiece whose bezel can be easily attached and detached by a user without requiring a special-purpose tool. The receiver unit additionally displays the relative position of the emergency vehicle upon a display panel. Based upon the association of activities with corresponding virtual thread identifiers, a directed graph of different activities of different virtual thread identifiers can be generated. A second interpolation part performs a pixel interpolation process while evaluating the correlation relatively low. An edge detector detects when a next edge of the panel is approaching the sewing machine. The pair of voltage pumps is coupled for supplying both positive and negative voltage biases to the memory array during program and erase operations, such that a sum of the magnitudes of the positive and negative voltage biases is applied across a storage node of an accessed memory cell.