This pen measures 5 1/8 inches (`130mm) long when closed . The barrel is marked near the clutch ring as follows , Made In USA , 51. (dot) . The polished stainless steel cap is marked Parker . The press fill bar is marked Parker 51 Special , To fill press bar four times ect . , The parker Pen Co , Made In USA . The 51 Special has the Octanium nib and the highly  polished stainless steel cap .