odd vintage ukes

hello I've seen a couple of these ukes pop up every once in a while here in the netherlands

they look like mahogany sopranos and all of those I've seen online come with the same type of vinyl like bag

here's a picture.

http://verkopen.marktplaats.nl/photopopup/415394105/1

anyone have a clue what kind brand they are?

Don't know--but are they a German brand?

they have no brand mentioned in the ads.

I've asked the seller to take a picture of the soundhole and headstock