Pelikan M400 from 1954; 14k extra-fine nib. Very smooth with flex to it.

Just acquired this pen in a trade--I love it, and unfortunately, need to whittle down my collection. It has signs of use and feels great in the hand--previous owner recently tightened the cap and cleaned the piston assembly/greased it.

This is one of those every day carry pens for sure. Asking $110 shipped, tracked, insured CONUS.