This pen was kindly lent to me by my friend Stephen (fantastic name, by the way).
Measurements
Length (capped): 127.6 mm/5.02″
Length (uncapped): 121.0 mm/4.76″
Length (posted): 165.6 mm/6.52″
Diameter (barrel): 13.0 – 13.2 mm/0.51″ – 0.52″
Diameter (section): 9.0 – 9.9 mm/0.36″ – 0.39″
Weight (all): 17 g
Weight (cap): 12 g
Weight (body): 5 g
