Retro 51 Tornado Vintage rollerball, "Dr. Gray", which is an ode to Henry Gray, well known for his book on the human anatomy. The pen has a lacquer finish barrel and an antique silver trim. The pen is fitted with a smooth flowing rollerball refill that is retracted with its patented knurl twist-top. Replace the rollerball with any readily available Parker-style ballpoint refill and your Tornado is now a ballpoint pen. • PLEASE NOTE : Matching Tornado Dr. Gray Pencil Sold Separately.