The number on the fan is shown as being used on 289 Mustangs (and others) and 390 Comets and Fairlanes in the 66 Mustang Engine Accessories Manual. This confirms what Chris said. The associated clutch is id'ed as C4AA-8A616-C for the 289's and C5GE-8A616-A for 390's. The 65 Manual shows a clutch part number of C4AA-8A616-A for the fan, the 67 manual was no help.
The marking of "E-EOME-AA" looks like almost a part number (from the 80's - E0ME-AA), almost looks like a company name, and almost looks like nothing I've ever seen.
Jim