Wasn't sure if I should post it in the LoN board or here. Decided in the end to do it here.
Having looked around on the League of Nations Photo Archive site, historically in 1945 the Judges were:
Rafael Altamira y Crevea (Spain)
Dionisio Anzilotti (Italy)
Antonio Sanchez de Bustamente y Sirven (Cuba)
Cheng Tien-His (China)
Rafael Waldemar Erich (Finland)
Willem Jan Mari van Eysinga (The Netherlands)
Henri Fromageot (France)
J. Gustavo Guerrero (El Salvador)
Cecil James Barrington Hurst (UK)
Demetre Neglulesco (Romania)
Charles de Visscher (Belgium)
Two resigned in 1942 which might or might not be war-related but for simplicity I assume that they would probably still be part of the PCIJ in WW...
Harukazu Nagaoka (Japan)
Francsico Jose Urrutia (Colombia)
One is unclear due to a copy-paste error on the site but most likely was still around as judge...
Manley O. Hudson (US)
So that would give us 14 Judges....
Cuba and El Salvador are part of Iberia and China is no longer a LoN member and probably no longer a member of the PCIJ either (guess I'll make Japan president and kick them out
)...
So that means we would have...
1 - Rafael Altamira y Crevea (Iberia)
2 - Dionisio Anzilotti (Italy)
3 - Rafael Waldemar Erich (Nordmark)
4 - Willem Jan Mari van Eysinga (The Netherlands)
5 - Henri Fromageot (France)
6 - Cecil James Barrington Hurst (UK)
7 - Demetre Neglulesco (Romania)
8 - Charles de Visscher (Belgium)
9 - Harukazu Nagaoka (Japan)
10 - Francsico Jose Urrutia (Colombia)
11 - Manley O. Hudson (US)
... 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.