Lots of readers on this post . . . but no posters! I was hoping for at least a good urban legend . . . maybe like the Conn Naked Lady stories.
Alas, I had to go dig up some very non-sexy fact. Here's the word from Babbitt:
Dear Sir,
Approx. 10 – 12 years ago the stamp was wearing down & a new stamp was made. The quotation marks were left off. The boxes still have “Super” on them.
No difference in the mouthpieces. They could have been made within a week (or day) of each other, one with the old stamp & the other with the new stamp.
JJ Babbitt Co.
So there you have it. Not very glamorous I'm afraid. I may start my own urban legend about this just for the heck of it. I've asked for just a bit more info from Babbitt and will add that if I get what I'm asking for.