Retro 51 Tornado Vintage mechanical pencil, "Albert" with a printed finish with Einstein's Theory of Relativity. 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. You'll find both the Schmidt Retro 51 capless rollerball refill and Parker Standard ballpoint refill for this pen. • PLEASE NOTE : Matching Tornado Einstein Pencil Sold Separately.