Thank you to Duane Zimmerman for contributing this old image. There are more photos of this building when it was Pan American World Airways seaplane terminal at: http://www.pbase.com/donboyd/memories_aviation_paa
pretty sure that is where my mom worked,in the Traffic fines division,it was called. I used to go 'help' her now and then ,rode the bus down ,and then back home.
This was originally the Pan Am Seaplane Terminal in Coconut Grove. I lived in Coconut Grove from 1940 to 1959. Spent most of my free time around the bay.