brand by headstock

Allthough a large number of brands have a 'crown' design that mimics the Martin, others have their own specific shape, like the Riptides. Sometimes i can tell the brand by just looking at the shape. Then I spotted this one:
http://www.ebay.de/itm/250922641593

And I know I've seen it before, but where? Can someone point me in the right direction? Thanks!
(Not that I'm buying mind you, I had my uke-a-month allready )

There was a question (in German) posed to the seller, and he said he can't find a label inside, that there is just a number 640283 on the bottom. It might be a one-off or a custom build, or just a uke that someone found somewhere. Sorry I couldn't be more help...

Looks similar to the Kamaka concert headstock. I think they call it the Sail shape...

http://www.theukulelesite.com/ukulelemarket/new-kamaka-concert-beautiful-koa-wood-body

I don't mean that it's a Kamaka - definitely not! Just that the headstock has a similar shape. No idea what brand that might be.

I saw Kamaka influence in it too.