That would make it a first edition, I doubt there could be an earlier one. That would make some writer very special if there was...
So you and I both have a first edition. I suspect it was printed in large numbers, though. It was a "populist" book.
The way the pound is, it's more like $5.But that's what I paid for it. Who knows? It might be worth $1,000,000 at auction.Or $1.25.