We have missed out quite a few classic poster artists from this blog and as I said the other day, Frank Newbould is one of them. His immediate pre war work stands up with the best.
I remember this time last year I had a huge billboard version of this poster hanging in my stairwell, or at least half of it (it was actually the LHS with all the detail in it). as half a poster it was virtually valueless. a small version $3000, the larger one : who knows.
Anyway its a study in the block colour technique.