Abstract: A perforated plate-shaped material in which a surface property/shape of a main surface of the plate-shaped material is maintained in at least a part of a hole surface forming a hole in the plate-shaped material are provided. The perforated plate-shaped material has at least one through hole penetrating from a first main surface to a second main surface opposite thereto, and in its cross-sectional shape, it has a smallest width portion on the hole surface and a first main surface portion where the hole surface terminates on the first main surface and includes a first projecting curve portion between the first main surface portion and the smallest width portion, and at least a part of the first projecting curve portion has a surface property/shape of a non-hole surface on the first main surface.

Abstract: An integral watch band is comprised of a plurality of beam portions adjacent to one another in the lengthwise direction of the band. Each beam portion has two major faces opposed to each other and two side faces disposed between the two major faces in opposed relation to each other in the widthwise direction of the band so as to define between a pair of adjacent beam portions a corresponding pair of side faces adjacent to each other in the lengthwise direction. Each pair of adjacent side faces has a pair of arm portions protruding outwardly from the respective adjacent side faces in the widthwise direction. A plurality of elastic bridge portions are integrated with the beam portions through the arm portions to form the integral band. Each bridge portion is elastically connected between each pair of arm portions to enable the integral band to expand and contract in the lengthwise direction.