"FileWare"???? That was Apple's name for the "Twiggy" drives used with the Lisa 1 and very early Macintosh prototypes. Is this a 3.5" disk, or something like a 5.25" disk? If its the latter (unlikely, but you never know), we demand pics!!! :O

For what its worth, here is an article on FileWare disks, with a pic. Even if I'm wrong, and its just a production model and "FileWare" is just the name of some program...still...nice score!