Set of 3 Women's Auxiliary year pins, from the First (green), Second (red), and Third (orange) years.
First year is marked with JBWA, Second year is marked with JBWA, Third year is marked with JA.
Rupertsland pin is marked with STERLING on the reverse, as well as another mark which may be the maker. Year pins appear to be marked STERLING as well.
Assuming to be WW2 era.