When I was a kid, I believe it housed Atlanta Federal Savings. That would have been early to mid 60's. I always sorta liked it; those rounded concrete ribs look a little like whale bones, or so I thought when I was 10 years old.
AFS was "Home of the Thousand-aire", if I recall correctly. At that time, Five Points was the financial center of the South. This photo also shows the one-time home offices of Fulton Federal Savings (bulky, pinkish building between AFS and 191), Nat'l Bank of Georgia (over AFS right shoulder, once the city's tallest at 32 floors), and First Nat'l Bank of Atlanta (brown tower at far right, ecliipsed NBG to be tallest at 41 floors).
Once upon a time, this was a "big city" view that made my young heart beat faster as I walked north from Rich's toward Marietta Street.