Missed this one. Coveted indeed!
Here is what I'm seeing:
.821" or 20.85mm on an 80s Huffy, although yours maybe be different.
If this is what you need, let me know and the seatpost is yours. Just PM me and I'll get it sent out to you.
One thing that might help confirm is if you take an inner diameter measurment of your seattube where the seatpost is inserted, and I do the same, and see if they are equal. If that is the case, then this one will fit!