Here are my nine London Gillette signs. Some of them aren't immediately obvious as they are hidden behind other ads for newspapers, remedies and matches. Click the montage above to view it at a larger size, or to see each one separately click here.
Clockwise from top left: Grays Inn Road, Peckham, Kings Road, Stoke Newington, Dalston, Kilburn, Spitalfields, Acton, and in the centre, Clapham.
There are others I know of in Willesden and Southwark, and maybe a few more, but I haven't taken any photos of them myself (yet!).