<snippage>
Assuming that is its original case, the diamond logo would allow you to pin it to later than 1908, at least. But the fact that it's a stitched-in label instead of an actual imprint on the fabric of the headliner would probably imply that it's still fairly early. Also, the fact that it lists King Gillette as "President" on the printing that's on the bottom of the case gives you an additional "not earlier than" point, since when KCG first joined up with the corporation his title was "Vice President." Later he was given the title of "President" but John Joyce maintained most of the actual control of the company. I'd have to do some digging to try to put a date to that change, but I'm pretty sure that the diamond logo was later than that, anyway.
I love this stuff!