Hi CJay,
"Greenfield Evolution III 10.5" , I saw someone on here say they had a 2003 Evolution III 13-32 so most likely around 2000.
Determining the exact manufacturing year of a specific model like the Greenfield Evolution III ride-on mower (10.5hp) typically requires checking the mower itself for a serial number or a manufacturing label. These details are usually located on the mower chassis, engine, or in the owner's manual.
Manual click on thisCheers
Max.