The writing instrument is officially not a 221, since the 221 always had a particular gold nib. An early model of the "Generation" 13100 can also be ruled out, since these had a model number in the cap ring and also a gold nib. The "Classic" line or older writing instruments from the third series come into question; the latter, however, had only one cap ring. The missing 585 hallmark unambiguously points to a gilded steel nib, which supports the classification as a cheaper model.