The model with thread guilloché is a Montblanc Noblesse I in platinum-plated execution, originally with rhodium-plated steel or white-gold nib. In 1980/81, while keeping the model number, the change to the Noblesse II followed, which is why Montblanc partly states the production time extendedly. A white-gold nib is unusual in this line; mostly a rhodium-plated gold nib is present. The Carrera line was also made in the 1970s, typically had only a steel nib, was at the time very inexpensive (the three-piece set barely above 50 DM) and is today classified as inexpensive collector ware.