Not postmarked, but stamp is a 1938 Presidential Series stamp. The sender writes "Sunday April 8" at the top of her note. The Notre Dame Perpetual Calendar indicates that date fell in the years 1945, 1951, 1956, 1962, and 1973.
Indianapolis, Marion County, Indiana, United States
Evan Finch Collection
Marion County (Ind.)
Further information on this record can be found at its source.