Watch with a transponder unit, e.g. for use in paying for access to ski lifts, has an antenna coil and a watchcase of conducting metal with the case designed so that it does not, or only partially, covers the coil

摘要

Watch (1) has a case (3) and a transponder unit with an antenna coil (6) within the case. The case has a first section (10) that is made from an electrically conducting material which does not or only partially covers the conductors of the antenna coil.