I really like the idea of an ebonite Kaweco Sport:

https://cultpens.com/products/kaweco-ebonit-sport-fountain-pen-set

But £295 for an unnumbered, limited or not, pen is one for the collectors. Not quite a Montblanc price where a person is permitting themselves the luxury of being vastly overcharged for an excellent pen. (No problem with nice things. A Montblanc will remain valued over time. A pen for life if properly maintained.)

The ebonite Sport is pricier than a Lamy 2000 or limited edition TWSBI or a gold nibbed Platinum or Sailor. A TWSBI is an good pen*, a Lamy safari is a good pen, a Kaweco Sport is a good pen. The USP is that this one is ebonite.

And it doesn't come with a converter to take bottled ink. I think a 140th anniversary edition should come with a converter because ink cartridges are a very 20th century thing.

* I have a TWSBI Eco (short for economy) that is, in my opinion excellent, which is a subjective judgement. It has a very smooth nib, holds a lot of ink, and is cheap enough I wouldn't feel like crying if I found a nephew or niece playing darts with it. It's a workhorse. YMMV - maybe I got a good one. Basically the same thing applies to the Sport and Safari but less ink capacity. A good nib is a good nib regardless of material and the same for a bad nib. Although I am attached to that pen.