Of course I wasn't there and the toolmaker is long gone so it's speculation.I never quite understood this. If you're going to do something non-compliant with the standard to intentionally fudge the numbers, why not just pencil whip it and be done?
What it sounds like to me is a feud between the toolroom and the engineering department. Some tight-assed engineer applies tolerances that are so tight they're hard to meet, and the toolmakers know that they're not functional, either for tool operation or for the finished product. But they have enough integrity they don't want to write down something completely fictitious on the inspection sheet. So they can say with absolute honesty that they measured that feature and got that number on the mic.