I've still got my 1956 edition which apparently cost me 5/-. Sadly the dust jacket is long gone but otherwise it's still in good condition. The old ones often come up on eBay if want to buy a few back or Abebooks can track some down, link hereAbebooks
I had a ' Dumpy Book of Ships ' too, which I'd love to find again. It was full of profile drawings which probably came from Talbot-Booth.
Oh, and I had Obsever's Books of all sorts of things ! Just seeing the cover makes me feel like a kid again !