Montblanc made a complete range of leather goods in the Platinum line, including business-card cases. Decisive for the correct assignment is the colour of the corner reinforcement: a gold-coloured corner refers to the older Solitaire leather series; a silvery or platinum-plated corner to the Platinum series. Both variants are genuine; deviating inner fabrics compared to other leather articles are possible, since the materials between lines and across production years can vary.