Instructions how to upsycle metal Kaweco pen-case into a padded one (it fits 3 Kaweco fountain pens or 3 Pilot Prera). Detailed instructions were posted on my blog: How-to: Kaweco tin box pen case
Unboxing and detailed photos of Kaweco x Tokyobike fountain pen, it is a is a China Exclusive release and the colour is called "Dynamic Yellow". Full review: Kaweco x Tokyobike fountain pen review