Both writing instruments are most likely genuine; matching original refills as well as a correctly executed clip construction are central indications, since counterfeiters often use Parker mechanisms on the ballpoint. The pearl is the small spherical thickening at the lower clip end, which fixes the pen in pocket or case. At Montblanc this pearl is soldered on as a separate component, while on cheap writing instruments it is merely punched or pressed out of the clip metal.