The Silver Mule offers a unique tactile experience, as its entire surface - cap, barrel and finishes - has been vertically brushed giving it a vintage touch. This complements the clean, minimalist shape, reminiscent of the spaceships of 1950s science fiction book covers and the dream architecture of the 1930s. This marriage of modern and retro gives the Silver Mule a unisex appeal, a happy combination of both feminine and masculine qualities. All Montegrappa writing instruments are guaranteed against any manufacturing defect for 24 months from the date of purchase. Any part of this pen with even the slightest manufacturing defect detected by our authorized customer service department will be repaired or replaced under warranty. To benefit from the international guarantee, simply present the international guarantee certificate, correctly completed by one of our authorized resellers, complete with stamp and date, to one of the Montegrappa assistance centres.