The Blue Grotto Collection Limited Edition. A timeless classic encounters the fascination of the Island of Capri. Delta, has created in collaboration with the Capri institution a collection of writing instruments named “Capri”. The Blue Grotto collection includes: The Blue Grotto Jewel Celebration Limited to only 25 pieces worldwide fountain pens in white and blue resin offers details in 18 kt solid gold rose and diamonds, with the traditional filling system, the lateral lever. The Blue Grotto Celebration Limited to only 250 pieces worldwide fountain pens in blue resin offers details in 18 kt solid gold, features a piston filling system. The Blue Grotto 1Ks Limited to only 2500 pieces worldwide fountain pens in blue resin offers details 925‰ sterling silver gold plated, features a piston filling system. The Blue Grotto R-2 Limited to only 2500 pieces worldwide roller ball in blue resin, can be easily converted into ball pen, offers details 925‰ sterling silver. The Blue Grotto 2 Ball point limited to only 2500 pieces worldwide, in blue resin, offers details 925‰ sterling silver. Technical characteristics The Blue Grotto writing instruments are made of special resin worked by hand from solid bars and polished to a mirror like surface in colors chosen to match the distinct and characteristic blue of this island. The clip in carved by hand and is in 925% solid sterling silver, portraying the waves that embrace the Island. The central band is also carved by hand and it is in solid sterling silver. Glancing internally at the cap of the limited edition writing instruments, one notices emotionally, the evocative glare of blue light that is emanated inside of the Blue grotto. The nib is in 18 kt solid gold and it is available in various grades: EEF, EF, F, M, B, OM, STUB. It features a piston filling system. All trimmings are platinum plated. The roller aesthetics are similar to those of the fountain pens. It features a refill type cap-less, which can be easily converted into a ball pen. The ball pen offers a rotating mechanism and features a long-lasting refill.Serial numbers : 366,412/2500