I have always wondered. I guess the question begin with this: for a particular racket, say, Head Radical Oversize Trysis 260, how many does HEAD made? Roughly, how many? In tens of thousands, or hundres of thousands, or over million, etc? This question can be asked for nowadays, and can be asked for in the old times, such as in the 80s. So for example how many Wilson Prostaff Classic 6.1 was ever made? (not the 6.0, because I think the later Chinese version makes the 6.0 harder to count).