15c Benjamin Banneker stamp, which was the 1980 issue from the Black Heritage Series, vertically misperforated Never Hinged top left corner block of four, post-office fresh colors, paper and gum with completely intact perforations. an outstanding "Freak" block.

Production mistakes like these are called "EFOs" which is an anacronym for Errors, Freaks and Oddities. 

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BUY WITH CONFIDENCE

I am a true professional philatelist, doing this for a living since 1995. 

I have divided collections into auction lots and described auction lots for many major auction houses. 

In other words, you get what you pay for. 

SHIPPING

Both domestic and international is by USPS first class mail. Domestic is with insurance. The shipping charge is $.58 postage + $2.45 USPS insurance + $.52 eBay fees.

If you purchase multiple items and you wait for me to send you an invoice then I am pleased to combine shipping.  If you do not wait for me to send you an invoice then you will pay more for shipping.