What brand/designer has produced this art deco lamp? Kaiser Idell

Hello,
I recently purchased this lamp art deco from Germany, does anyone know by whom it was produced?
The reflector is made of plastic (diameter 26 cm) and the height of the lamp and 40 cm.
It looks like the 6638 model designed by Christian Dell for Kaiser in the years 30/40

It looks like Hala Zeis, type 144 design by H.Th.J.A. Busquet. If it is kaiser it will be rather model 6600.Will need bigger picture to make sure.

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Hello everyone, thanks for the answers ...
I put bigger images to see the details better (the lamp has no trademark).
I looked at the model of Busquet Hala but it is different, some other hypothesis?
The auction is equal to the model Kaiser Idell n. 6600, but the plastic reflector and the base are equal to the model 6638!

Hala lamp was guessing with a postage stamp which you placed ;)

Now everything is clear it is kaiser for shure.
But in this model nothing match :
- base is from 6638 model
- arm is from 6600 model
- lampshade if is made from resin it is from a 6638 model
You can unscrew under the base and with a little luck you will find number of model stamped in the cast iron. At 99% it will be 6638. This is a very rare model I assume that can happen a factory hybrids. This happens when lamps are turn from old to new models. As in the case of Kandem lamps.

Unfortunately, under the base by unscrewing the lid, there is nothing written.
I also think that it is a Kaiser Idell, however, very strange, I already happened to find hybrid Kandem but never Idell ....
I can just ask other information of my collection of my lamps German 30s: BUR, Zeiss Ikon and Idell / Jdell

See you soon Thank you

I see some unique solutions for Kaiser factory so for me it is 99.99% Kaiser. Can you post an image unscrewed cover of the the base?

Miccia wrote:I can just ask other information of my collection of my lamps German 30s: BUR, Zeiss Ikon and Idell / Jdell

I will be very happy to see

Hello,
here is the photo of the bottom of the base.
The arm bolt does not seem to have been unscrewed ... maybe you can find some similarities with other models Idell

Yes, it kaiser. Have you checked measurements?
Height 46cm Diameter of lampshade 26cm.
And I see cable replaced - Gambarelli?

Hello,
the height is 42 cm (as mod. 6600), while the reflector is 26 cm (as 6638).
The size of the reflector is actually a little disproportionate to the height of the arm.
The lamp is very beautiful, when it is on the reflector plastic leaves a very warm light.

The cable I do not know what brand it is ... it's the classic braided cable that I buy here in Italy.
The bakelit plugs I find instead in Germany (at a rather high price).
The paint of the base, I decided to keep the original one without repainting it (though it has some scratches), I prefer that they keep their story...

P.S. - I apologize for my mistakes in English :)