In my internet fartings-about since I posted a huge heap of John Wyndham covers, I've come across a few more, including some non-English editions. So, without further ado, here they are:
Another Penguin cover, by Herbert Spencer:
This Penguin cover was by Paul Hogarth:
One thing I did not mention in that last post, but which I ought to say, is that several of the books featured here and in that last post--The Secret People, Sleepers of Mars and Wanderers of Time--are early magazine pulp works that Wyndham himself mostly disowned, and should be approached with great caution. The rest of his stuff is ace, though.