David Oscarson Since 2000 David Oscarson, we have been creating Limited Edition Writing Instruments, corresponding Cuff Links and now Folding Knives in Sterling Silver, Guilloche (Diamond-cut Engraving) and Hot Enam Since 2000 David Oscarson, we have been creating Limited Edition Writing Instruments, corresponding Cuff Links and now Folding Knives in Sterling Silver, Guilloche (Diamond-cut Engraving) and Hot Enamel (Kiln-fired glass).