I too wondered this. The ISBN matches that for the 1938 facsimile version. If anyone else has already purchased a copy through Amazon, perhaps they would be able to confirm that this is the historical edition.
I've just received my copy of this and confirm that this is the historical reprint as per the illustration. No idea how some of the reviews relating to the modern edition appear here as these should be linked to the ISBN. I'd add that the reprint has been done very well with some yellowing to the pages which give it an authentic feeling and the slip case is reasonably sturdy.
I want to buy this to find out where I'm going in London, when visiting friends. If new roads (since 1939) aren't included because it's a reprint, then what practical use is the new A-Z? My old edition is falling apart, but I am now hesitating to buy a new one. If you have a new copy, please tell me if new names are included.