David Osarson Carl Linnaeus Fountain Pen - Royal Blue with Multi-Colored Translucent Hard Enamel. The new collection Carl Linnaeus is the nineteenth collection in the David Oscarson series of Limited Edition writing instruments, produced in three primary color variations, each limited to an aggregate production of 70 pieces (fountain and rollerball). This collection is a tribute to the seventy years of Carl von Linne’s work and his enduring worldwide influence. Plants and floral features in this collection remind us of the great scientist’s love for nature. The collection features multiple levels of guilloche engraving and seven colors of hot enamel. The fountain pens are fitted with 18k gold nib, takes cartridge/converter for refills. Add this epitome of excellent craftsmanship to your collection.