This is a shiny black celluloid Swan Self-Filler, a postwar pen, probably late 1940s. It is a very nice user pen, lever-filled (“Self-Filler” means that you don’t need to open it up to fill it…sorry, it doesn’t actually fill itself.) This pen is a typical Swan — 125mm long, nicely proportioned for its length, smallish but doesn’t feel small in the hand. The imprint is deep and complete. There is a little, generally not easily seen swelling from cap posting, but this is typical for these pens. The celluloid shows a few minor marks of use. The gold trim on clip, lever, and cap rings is untarnished and bright. The nib, which was described to me as “not typically English soft”, is indeed firmer than one would expect, but the nib’s identity answers the question: it’s an Eternal nib, from a 1930’s American Mabie Todd pen. That said, it writes a very nice fine to fine edge of medium line with a little bit of feedback. Nice pen, can withstand daily use.