Adopted this standard of metal stamps used by verification officers, for applying on measuring instruments, and where appropriate on auxiliary devices a mark for the following purposes. – To indicate that the instrument possesses the metrological characteristics required by regulations in force. – To prevent, in certain cases, access to setting and adjustment devices on measuring instruments. – To prevent, in certain cases, by means of sealing the use of defective or incorrectly adjusted measuring instruments, the use of which could be prejudicial to one or more of the contracting parties concerned. – To cancel an existing mark.