The Kaweco aerometric converter works well, with several squeezes, and being
able to easily use bottled ink is a terrific alternative to cartridges.
One caveat: this converter will not fit in certain, early Kaweco Sport fountain
pens. If your fountain pen has a nib with the Kaweco logo, and the nib size
abbreviation is engraved as a cursive capital letter, the converter will not fit
because the converter's metal sleeve will prevent it from seating properly.
Some early versions have the nib size as a cursive capital letter on the side of
the nib and the words "Germany since 1883" are engraved above the logo. Also,
these nibs may not have a breather hole. It appears that the main identifying
feature on these earlier pens seems to be that the nib size was always engraved
as a cursive letter.
The converter is supposed to fit snugly inside the section and connect with the
feed nipple. This is impossible in the earlier versions of the Kaweco Sport
because the feed nipple is further down in the section and the aerometric
converter cannot be pushed in deep enough to fit properly. An possible
alternative converter, without a metal sleeve, for the earlier models, can be
found as a mini-piston type converter, like the "Rosetta Mini Fountain Pen
Converter" sold on eBay, but I cannot guarantee that converter will fit all
versions of the Kaweco Sport.
The aerometric converter sold by JetPens will seat properly and work correctly
with later, newer versions of the Kaweco Sport. At this time, I have identified
these models as ones with a nib that has the round Kaweco logo and the words
"Germany since 1883" engraved above the logo. The nib size abbreviation on
newer Kaweco Sport fountain pens is engraved as a manuscript capital letter
(like M for medium) and not a cursive letter. Another indicator of the correct
pen is that the nib breather hole is somewhat larger on the newer pens. The
main identifying feature on the newer model nibs seems to be that the nib size
is engraved as a manuscript capital letter. Please note that the design of this
pen could change without notice.
The Kaweco Sport is a wonderful, handy little fountain pen and this aerometric
converter makes it even handier.
An excellent converter, but please note: Early versions of the Kaweco Sport
cannot use this converter.
I forgot to mention, in my other review, that JetPens sells a perfect
mini-piston converter that will work in the earlier Kaweco Sport fountain pens
(please see my other review for details).
If you have an older Kaweco sport, purchase the Monteverde mini-piston converter
sold by JetPens. It fits properly in the older Kaweco Sport pens (including the
"Chess" model), and it works like a charm.
Was I cautiously optimistic that this converter would work? No - I was
downright suspicious. But, not only does it work, it works really well. I
holds firmly in place, fills properly, it fits. This adds greatly to the
usability of my Al Sport.
I bought mine more for flushing water through my Kaweco's feed and section, than
to use it as a proper ink converter. It's tiny and awkward, but it does suck up
a minimal amount of ink. (I even tried doing several squeezes, in the manner of
lever-filler and vacumatic pens, but it never got more ink in it than a third of
Good for cleaning, yes, but for max ink capacity, you may as well use a syringe
or turn your Kaweco into an eyedropper.