This pen isn’t too different from the Kaweco Sort. But I purchased it for the double broad nib.
The Wahl-Eversharp Skyliner 50 is similar to a vintage pen, but made with more modern methods including a converter. It has a somewhat flexible nib, but not amazing. The converter inside is made to look like a piston pen under the blind cap. The drawback to this is that you cannot check the ink level.