Wasn't sure if I should post it in the LoN board or here. Decided in the end to do it here.
... leaving 3 spots open. One would probably be Atlantean and another would be South African. Not sure about the final spot. Historically Russia was one of a few nations that did not sign the Statute of the PCIJ. Wesworld Russia may have done so, so in that case I think that final space could be for Russia.
Unless there's any evidence to the contrary, I'll probably say Russia did sign the PCIJ Treaty.
When I looked at it and our map, I knew that it would probably be either Russia or Germany. Since there has been only one German Judge (Walther Schücking from January 15, 1931 until his death on August 25, 1935), I believed that it was more likely that that final position would be held by a Russian.
That's a nice bit of research and the membership looks ok to me.
The only bit that appears to be questionable right away is the Hudson info. It is exactly the same as Hammarskjoeld ("Elected October 8, 1936; Died July 7, 1937") but the Individual Judges page indicates that Hudson died in 1960.