.....so I'm gonna ask?  

more
more

This one is cited as a Kalff...
This one is cited as a Kalff design, similar perhaps

There are alot of similar...
There are alot of similar ones around like yours or the image you have just posted
I'm always curious to my finds and I've looked all morning on sites that I know
I have a serious book collection that it may be in but it's all crated away..damn!
I paid $10 AUD this morning at a car boot sale
It measures across the dome 44cm so it's large

Now that I have taken more...
Now that I have taken more of a look there are a lot of similar types out there, like you said, but none quite the same so far. This one was only cited as "German".

hmmmmmmm
hmmmmmmm

that was close tchp!
any idea of the age of that one tchp?

Retailer (linked) refers to...
Retailer (linked) refers to it as "early 60's"
http://www.designsofmodernity.com/lighting.html

being round as it is it's...
being round as it is it's more reminiscent of the 50's even the green coloured paint

1930's design
This type of lamp is pretty common here in Sweden. It's a 1930's design as far as I know. Christian Dell did similar lamps, but I think it's a quite common style from this period.

after rethinking
after rethinking I don't know what I was thinking thinking that it was 1950's...you're right...me thinks i don't think enough

Thanks for asking. It looks...
Thanks for asking. It looks like a FASE but could just be something similar.
http://shop.ebay.co.uk/?_from=R40&_trksid=p3984.m570.l1313&_nkw=fase+lam...