I’m a sucker for the Kaweco Sport: I think they’re great little pens. Compact, nice Peter Bock nibs, and versatile: they can easily be made into eyedropper pens with a little silicone grease around the threads.
I have black, green and brown Sports, and a vintage piston-filling one from the 50s. The other colours I wasn’t crazy about, but I couldn’t resist this cognac colour: it reminds me of amber.
This cognac Sport seems to be available only from Seitz-Kreuznach, in Germany. I’ll never be a shill for anyone, but they are good people, with reasonable, flat-rate international shipping.