SCHEDULE 4(Descriptive markings and verification markings: Extract from Part 1 of OIML R 61 and additional marking)
MountingI13.11.2
Filling instruments required to bear verification marks shall have a verification mark support, at the place provided for above, which shall ensure the conservation of the marks.
When the mark is made with a stamp, this support may consist of a strip of lead or any other material with similar qualities, inserted into a plate fixed to the filling instrument or a cavity bored in the filling instrument itself.