In late 1968, Pelikano was revised again (from model 2 to model 3). Accordingly, the design and construction of adult fountain pens were revised similarly in 1969. As for cartridge filler pens, Pelikan revised P12 and P30, introduced P21, and reintroduced PK10 and P15. In design and technology, they were developed from Pelikano (model 3). There had been no luxury model for P series for years, but in 1970, P60 in all rolled gold was introduced. Around 1971, the structure of the thermic regulator was changed in secret. Now, the one piece feed with numerous fins and a protrusion also served as a thermic regulator. P series was further expanded. P28 and P18 were introduced in 1971 and 1972, respectively. In 1972(or 1971), two models (P11 and P16) with special stenography nib were introduced. They were named "Steno". Starting in 1973, all models had three-digit model numbers. P series was produced until approximately 1979, after which it was replaced by Signum series introduced in the same year.