This knife is interesting.
It is basically a "Premier"
http://www.sakwiki.com/tiki-index.php?page=Premierwith the blade tip rounded.
The sticker on the box looks like the ones that Herbertz (german importer and distributor) used to put over the Wenger labels.
Also, the invoice reads "Taschenmesser Wenger Kinder 15", so the name "Junior 15" could be possible.
However, there is no name written on the box, so I'm not able to confirm it.
I suspect this knife was probably sold only in Germany, as other "kinder" (junior) models (like the evowood, patagonian etc...) not available elsewhere.