I was wondering about „v.g-“.too, when I had.this Bremen card of Germille COLMANO, with same POB „Pola“ , formerly in Italy, later part of Yugoslavia (today Pula, Croatia)
One of his documents mentions „Pola, VG, Yug“ (see entry in „country of last residence“)
„Italian VG origin claimed“ (entry in „Ethnic or National group“)
Just an idea:
VG for „Venezia Giulia“ (abbreviation found in source), according to Wikipedia a historical region on the Upper Adriatic in Central Europe. Pola is mentioned as one of its provinces.
[edit 31.01.2024]
Just had another card with „VG“ and place of birth „Pola“