Hello Lupino...ive little wish to strip down what makes a redial, i'm afraid. This site and others like it is littered with snoopers on the periphery of the watch industry looking for heads up in how to deceive.
The script signature from this genta-esque era was of a certain delicacy regardless of applied or printed iwc insignia or simply signed by script...your offering doesnt follow this script and is so poor i'd guestimate could'nt possibly be a service replacment.
That said ^ if a redone dial doesnt bother you then fine youve still got the opticians route...if it does bother you then the schaffhausen route becomes an option, they'll no doubt tell you why the dial couldnt possibly be one of theirs.
Be lucky.