I agree with Smauggie. That stamp was available in a booklet pane of 5 stamps + 1 label under Scott Catalog No. C64c. Miscuts of that issue were quite common.
The stamp shown would be the lower right position of the booklet. The perf issue shown at the top of the stamp may be a slight oddity or could be a "blind perf" because of a poor perf cut, but nothing of any particular value. Would probably be classified as EFO at best.
Interestingly, a used stamp of the non-booklet variety has a minimum catalog value of 20 cents; a used copy of the booklet variety shown 75 cents ... must be due to the limited use of booklets from that issue.
NOTE: These illustrations may help. Here's the same stamp from my collection (but a bottom center rather than bottom right example) but shows the same miscut typical for this issue:

Also, the catalog illustration showing the format of the booklet used from that issue:
