O.K. I'm a learner. I have one of those little round adapters as well. I wondered when it was used.
If I hadn't made the comment, a lot of us would never had learned about it, on this valuable forum (Is it true we have 5000 members, and only 50 of us have helped to keep it going?)
I guess it is also good to have noted the difference between "New Old Stock" and "New Stock" (will Macs give us a discount for the advertising?)
My apologies Perry