Medium bronze cannonball (rare). in Winter Park, FL

Medium bronze cannonball (rare). thirteen pound ten ounce, 5" in diameter. Just like a regular cannonball but made out of bronze (reportedly to counteract the fact that iron cannonballs rusted away before they could be used) and rare as such, the entire surface a dark, rusty brown color with slight tinge of green, with minor localized pitting only. With certificate from the salvagers. Recovered from