That's very nice indeed - any idea when it was made?

That's a beauty, great find!

thats lovely, when i was a kid we went to some museum when on holiday and there was some weird contraption you got in and sat in on a chair, inside it was rows and rows of these carbon filament lamps with that spiral filament like yours, think it was some sort of sun tan machine or something, it was bizzar ! so robertsons was part of GEC then as it says patent GEC on the lamp also, have you lit it?

yes you have lit it, only looked to the left lol, see its 210 volt so before the war, be 1920's or 30's this

Hard to believe that this is before WW2 because of how pristine it is! And I love the glow of proper carbon filament bulbs!