Arne Vodder? ID help please! Arne Vodder?  

I looked for a half hour.
I looked for a half hour for something resembling your piece. In my opinion this is 50's, Danish. I would start your search with 1950's because of the round handles.

the stamp
looks like a danish custom control stamp.

Yes, it looks to me like it says
Københavns Toldsted.
Københavns = Copenhagen's
Toldsted = Customs office, I think
I can't read the bottom line except it starts with "Told"

something with Kontrol
it seems in the bottom line.

Arne Vodder
I just noticed the doors are reversible. On the back they are black with the teak round pulls. I just found some Vodder pieces that look just like it. Can anyone confirm this?
http://www.pinterest.com/pin/531706299727167130/

Yes you should check the shape of the legs
compare it to others online.
Isn't there a sticker or label on the inside?
I have a sideboard with tambour doors by Vodder (Sibast pieces
are almost always labeled, in my experience. But maybe the sticker fell off),
the front edge of your case seems similar to mine.
Is there a support between the pairs of legs, which floats a little under the cabinet? (left and right).

Arne Vodder
Yes, see the second picture, I think it has the piece you are describing. Both doors are reversible. No label or sign of a label anywhere. Thanks for your help.

I'm pretty sure that is an Arne Vodder design.
The shape of the legs and the position of the stretcher is typical of Vodder/Sibast productions.
The construction of the interior and shelves is also consistent with Sibast pieces.
Some Sibast pieces were marked with a metal tag that was affixed to the back by two pins, these are often removed in which case it would appear unmarked.
It's a lovely thing.

Yeah: I agree with H.moon. ...
Yeah: I agree with H.moon. Now that I see the reversible doors and the stretcher underneath it does look a lot like a Vodder/Sibast piece. There were a LOT of different variations on the theme.