Has anybody ever seen this...

[archeophoto]

or is this a "Frankenstein camera"? It looks like the top with the viewfinder is from a Welta Weltax. The rest I don't know, but I don't think it's a Welta Perle...
http://cgi.ebay.ca/6x4-5-FOLDING-BE...714?pt=AU_Vintage_Cameras&hash=item3f0a90aaca

 

[FrankS]

This type and age of camera typically has a flip up folding type of viewfinder. The original was probably damaged, and this is the resulting homemade fix. Also includes an accessory shoe it looks like.

 

[hanskerensky]

It is for sure a Japanese camera, not a German one.
There is N.K.K. Wester written on the shutter.

Difficult to see what is engraved on the lens but it looks as something like Reginon.

Probably a Semi Leotax DL, see this picture :

http://www.flickr.com/photos/rebollo_fr/1349554463/

And, no Frankencamera so maybe worthwhile ;=)