A bit different time frame, but my Zeidi who immigrated to Chicago in 1913 sent money to his wife in the Warsaw ghetto via American Express.  She received the funds regularly until she, my uncle and mother were allowed to leave when the Germans lifted the siege of Warsaw in 1916.  They then came over on second class tickets (that were paid off over time).
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Sarah L Meyer
Georgetown TX
ANK(I)ER, BIGOS, KARMELEK, PERLSTADT, STOKFISZ, SZPIL(T)BAUM, Poland
BIRGARDOVSKY, EDELBERG, HITE (CHAIT), PERCHIK Russia (southern Ukraine) and some Latvia or Lithuania
https://www.sarahsgenies.com