Minimalist, yet surprisingly flexible - the Supra Fireblue is designed very cleverly, which means it can be made into two different lengths, and the cap screws securely onto either end, at either length.

To create the stunning finish, the surface of a steel Supra is tempered in a flame to not only harden the outer surface but to give it a beautiful varied finish with tones of blue, purple, brown and orange. As each pen is tempered by hand, the finish varies between pens, so you'll be unlikely to find any two pens that look alike.

With the middle extender fitted, it's a full-size pen, with plenty of space for long cartridges or a standard converter. It would be comfortable for almost anyone to use unposted like this. You can still screw the cap on the back to securely post it, but the result is really quite long.

Remove the extension tube, and it's a short pen. Quite a normal width, but short and stubby to make it more pocketable. In this format, unless you have very tiny hands, you'll probably find it more comfortable to use posted, with the cap screwed on the back to extend the barrel to a more usable length. In this short layout, there's only room for a mini Kaweco converter, and only the shorter type of international standard cartridges can be used. Without the extender, it very much resembles a wider version of the wonderful pocketable Kaweco Liliput.

The nib is large, and made from stainless steel - not interchangeable as with most other Kaweco pens, but it is still a screw-in nib unit for easy replacing if you ever need to.

Dimensions: full length capped: 128mm; full length posted: 162mm. Short length capped: 97mm; short length posted.

Supplied in a nostalgic metal Kaweco gift box with a blue short international standard cartridge.