Abstract: A timepiece includes: a casing; a light transmission part; a function part; and a glue adhering the light transmission part to the casing. The casing includes: a projection projecting from an inner circumferential surface and extending along a circumferential direction; and a protrusion protruding from the inner circumferential surface and determining a position of the light transmission part. A lateral surface of the light transmission part is adhered to the inner circumferential surface. A peripheral part of a bottom surface of the light transmission part is adhered to a top surface of the projection. An outer circumferential surface of the function part extends along an inner surface of the projection. A space is present in a facing region where the projection faces the function part along the light transmission part. The space is wider in a specific section including the protrusion than in a section different from the specific section.

Abstract: A system providing effective adjustment of an advertising volume is disclosed. Upon receiving use information indicating that advertising information has been used in a terminal device from the terminal device, a variable parameter corresponding to an electronic commodity with which the advertising information is associated on the terminal device and/or a variable parameter corresponding to an electronic commodity as information included in the advertising information is updated and then the advertising information associated with the electronic commodity to be transmitted is controlled on the basis of the variable parameters after the updating.