While virtually all other manufacturers were committed to, and using, either converters, twist-filling (inner piston) mechanisms, or cartridges, Delta took the bold step of reintroducing the lever-and-rubber-sac system for drawing ink into the fountain pen. Due to commonly-held, preconceived notions about the efficacy of the lever-and-sac apparatus, Delta reserved this "old-fashioned" method for special limited editions only—as exampled by a current limited edition, the Giacomo Puccini.

From the beginning, the firm's research and developement department dedicated itself to the study, production, and use of rare and demiurgic materials, an early result of which was the Extrema Collection, the world’s first writing instruments made of carbon fibre and titanium. In the coming years Delta would debut historically exigent, sometimes even prescient, pieces.

In July, 1994, as a sponsor of the "G7 Summit", held in Naples, Italy, Delta offered the seven leaders (Chirac, Chrétien, Clinton, Dini, Kohl, Major, and Tomiichi) The G7 Limited Edition, a three-piece set comprised of 1994 pieces. On September 7, 1998 the mayor of Venice received and declared the VENEZIA-limited edition, the official pen of the city of Venice.

One of Delta's most important collections to date, JVBILAEVM 2000 was created to celebrate the year 2000 when the holy year of Jubilee (a Biblical term, mentioned first in Leviticus 25:1, of the Christian Old Testament, for a recurring year of forgiveness, amnesty, and deliverance) coincided with the beginning of the 3rd millennium. As the chirographics company located closest to the Vatican, Delta leadership felt compelled to be the first to create such a pen, and its sense of obligation was fully validated by the result.

Delta experienced—and is experiencing—success with other important limited edition writing instruments as well. Among them are the Segovia, Venezia, Pompei, Colosseum, and others, celebrating the great cities and landmarks of Italy herself, historical locations and treasures that form the heritage of many modern nations and traditions. Tribute did not, however, confine itself to direct commemoration of people and things Italiano; the Nazareth 2000, the Isaac Newton, Napoleon Bonaparte, and Native American speak of an esteem for other peoples and states with whom common humanity and achievement is shared.

Though still relatively young, compared to some of her sister designers and manufacturers, Delta established, and has maintained, an array of collections that commands respect and appreciation from all, with the Dolcevita forming the core. Indeed, the Papillon is a extension of the Dolcevita, as is the Soiree, and, of course, the Mini and Stout branches of the collection family. A recent addition is the Vintage, low in cost, yet luxurious in design and colour, with simple durability.

Delta products display design and craftsmanship that evoke a common fascination for all that it is unique. Most traditional of ink filling systems, the lateral lever system, fitted into special materials such as the finest of resins, celluloid, and precious metals, combines with utter respect for classical rules of taste, and a deep commitment to reviving and expanding love of the handwritten word. A one hundred percent Italian business set up by the most artistic of craftsmen, Delta, Artigiani della Scrittura continues to dedicate itself to producing its renowned, high-quality writing implements, some of which qualify as true masterpieces. Continuing its richly varied line is an ever-expanding series of limited and special editions, all of which further cement Delta's commitment to culture, history, and grace: the Lucky, the Giacomo Puccini, and the Enrico Caruso, from 2007, and followed in 2008 by the Israel 60, and the Giuseppe Garibaldi.

All pen and pencil fanciers should keep close watch on this vibrant young company. For continued innovative thinking, marrying the best of bygone days, and the latest technologies, no other craft house is better suited to providing pieces that leave the workshop, already become priceless works of art, and collectors' items.