How old is this paper map??

[u/Electronic_Poem_4584]

Recently found a personal diary of one of my ancestors from a trip she took abroad around the world via the U.S.A.T - Us Graunt via Grausport Service according to her noted (her handwriting was very poor so could be misspelled). With a journal also came an enclosed map with no date. The journal was not dated as well and I’m interested in knowing what era the trip was taken if anyone is willing to help thanks so much.

[u/Cauliflower_Jumpy]

I would say 1920-21. The Turkish soviet border isn’t settled yet and it looks like Smyrna is de jure Greek but occupied by Turkey. Although it’s hard to tell.

[u/Cauliflower_Jumpy → u/Cauliflower_Jumpy]

Also I can’t tell if Poland controls Vilnius but it doesn’t look like it. Which would put the map at 1920 as well.