Ria, welcome to APUG.
My mother's Box Brownie Flash II was sold in Australia from about 1956 (in time for the Olympic games) through to about 1968 (old stock)
It isn't designed for 120 film, but it can use 120 film. Winding on is slightly stiffer as a result, but it should work as good as the day it was sold.
I ran a roll through my mother's camera 50 years after she bought it, the results were nearly identical to the pictures she took of me all those years ago.
Perhaps if you could tell us the exact model name and number (if it is marked) we could then work out what kind of film it takes.