Posted by SouthPaw I'm surprised by how old the map is. If I had to wager a guess, I'd say it was abandoned after 1952, just because it shows Queen Elizabeth.
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+1 on the Queen Elizabeth thing. The map itself is much older, I think:
It has Tanganyika territory in Africa, which was created in June 1919, so it can't be any older than that.
It has British Palestine, created in April 1920. but not British Transjordan (April 1921). So it can't be any newer than that.
To
maybe narrow it down, Hejaz has it's pre-1916 shape, but wasn't officially recognized in it's new shape until August 1920.
This would mean that the map was the shape of the world between April 1920 - August 1920.
It would be common sense to print a map right before one school year begins, so it would be as accurate as possible for the following year. Allowing for time to print it and ship it, you'd have to print the world as of May-June. Which would be consistent for this map.
However, I'm not a historian, and I've never worked for a map-printing company. I could be totally wrong, and I welcome the input of someone who knows better.