I've seen these before and I do like them. Some of these would be great for adding detail to VSF London games - perhaps as large posters on hoardings or how about a Thomas Cook travel agent shop (including some 'real' late Victorian posters too).
I particularly like the posters for Venus and Neptune - I'd consider a holiday there, but there's just no atmosphere
Most tend a bit more toward Pulp, both in theme and the deco styling, but lovely and not something I'd quibble, especially Neptune.
The Venus I just tried scales down rather well; I'm going to try others, but I don't think they have to be big, and would look well on walls on any table.
Edit: Well, as the ones I printed are taller by half again than a game fig too large, but still usable, methinks.
Thanks for pointing them out. You KNOW Camp Crystal Lake is going up on a wall SOMEWHERE...
Doug