That's a pretty cool license tag from 1913.
#6....I wonder who had that one??
Here's a link to some Florida license plate history that mentions Brooksville:
"Beginning in 1905, the state of Florida required all in-state owners of motor vehicles to pay $2 to register their vehicles with the Secretary of State and provide make, description, serial number and horsepower of their vehicles. The Secretary of State then issued a paper certificate, and the number of that certificate was to be displayed prominently on the back of the vehicle. The owner was required to provide his own license plate — a common practice in many states and localities before 1910. Although it was not required, some license plates had “FLA” displayed on them. License plates were typically made of wood, leather and metal, some were homemade, and some were made by sign-makers or even purchased through mail-order.
Florida cities imposed licensing requirements similar to the state. Jacksonville, Pensacola, Palatka, Ocala, Orlando, Miami, Tampa and Brooksville were a few Florida cities to have required motor vehicle registration and number displays."