Quote:
No Mr. Zip!? This is 1978. Didn't Mr. Zip go out in 1986?
Mr. ZIP wasn't used on all issues, as in this case, some issues simply used the phrase "Use Correct ZIP Code" instead. Remember, the 13-cent Indian Head Stamp was an
Experimental Stamp only available in five major cities nationwide.

Believe it or not, news reports at the time quoted the USPS as having said that the
"future use of the small format [stamp], if warranted by test results, would produce significant cost savings." How times have changed!
Apparently the "experiment" flopped as I believe only this one and the Dolley Madison stamp were the only ones ever issued in the 150 pane size, which was not very popular with the general public.