Hadrill & Horstmann?  

I recently purchased this lamp and was wondering if anyone could help me identify it? It shares a few characteristics with the roller lamp by Hadrill & Horstmann but obviously has some major differences too!

It is not stamped anywhere

It has the typical crinkle paint effect matching across all elements; frame, base and shade

The fork seems to be cast iron.  The brass and frame are made up of aluminium and brass struts

The shade doesn’t resemble any H&H lamps I’ve seen

This also doesn’t look like it’s homemade, it looks and feels quality.  Could this be a prototype?  Would love to hear people’s opinions.

Thanks!