What is your pen of choice, vintage or modern? For me it’s Swan, for several reasons: build quality, variety of nibs and the Leverless filling system. Celluloid Swans, especially of the 1930s, have an incomparable range of colours and patterns. They are very durable and restore to be the equal of any modern pen. That’s not to say that there are not many other admirable pens. The Onoto comes to mind with its excellent filling system and splendid nibs. In US pens the early Duofold heads the list with the Waterman close behind, especially the 52 and 94; great nibs and wonderful colours, both hard rubber and celluloid. The earlier flat-top Sheaffers are wonderful pens. In later Sheaffers I like the Triumph and inlaid nibs. Among German pens the Soennecken comes first though they are hard to find and expensive now.
What about you?