The Inverted Airmail Stamp - Side Bar: May ‘94 Aviation History Feature

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The Case of the Inverted Airmail Stamp

Although the difficulties experienced by Lieutenant George L. Boyle did not receive any notable attention in the press, a bigger story broke in connection with the first day of the airmail that still arouses interest from stamp collectors and writers. It concerns a single sheet of 100 of the first airmail stamps. Philatelists refer to them as “the 24-Cent Airmail Inverted Center of 1918.”

Inverted Airmail Stamp

On the 13th, William T. Robey, a stock brokerage clerk and an ardent stamp collector, went to the window of a post office in downtown Washington, D.C., near his office and was issued a full sheet of 100 of the new stamps, for which he had just withdrawn money from his savings account.

Robey took one look as the clerk slid the sheet toward him, and, as he later recalled, his “heart stood still.” For a stamp collector, he was experiencing the thrill of a lifetime. The entire sheet of two-color stamps with an airplane in the center had the engraving of the airplane upside down!

Without acknowledging what he had just received, Robey asked for three more sheets, but all were printed correctly. “I handed them back to the clerk,” Robey said in a 1938 article, “and then showed him the sheet that I had purchased and drew his attention to the fact that the airplane was upside down. Without any comment, he left the window and ran for a telephone. Needless to say, I left that office in a hurry with my sheet of inverts tucked safely under my arm.”

Robey returned to his office and told a friend. The friend immediately set out to find similar sheets in other post office branches but was unsuccessful. During his inquiries, the friend mentioned Robey’s name and where he worked. Within a short time, Robey was visited by two postal inspectors who offered him a sheet of “good” stamps for his sheet of inverts. It was an offer Robey had no trouble refusing. He knew that hehad a valuable find and that there was no law which said he had to give his sheet back. The only thing he did not know was just how valuable his acquisition was.

Robey went to New York City and made the rounds of stamp collectors to get appraisals. He received offers varying from $2,500 to $15,000 for the entire sheet and finally sold it for the latter figure to Eugene Klein of Philadelphia for a profit of $14,976. Klein sold the sheet later for $20,000 to Colonel E.H.R. Green, a well-known collector. Green later decided that he would break up the sheet of 100 so that other collectors could obtain some of the coveted stamps. Besides, as he predicted accurately, breaking upthe sheet would enhance the valueof the stamps.

The Post Office Department, as might be expected, did not enjoy the publicity given its most notorious printing error. The unsold sheets in the three post offices that distributed them originally were called in and the printing plate was altered so that the word “top” was added for the benefit of the printers who had to run the stamp through red and blue printings. Only a limited issue of this stamp was made.

Public interest in sending mail such a short distance by air decreased quickly. In July 1918, the price of an airmail stamp was lowered to 16 cents and a green stamp was issued. In December, a 6-cent airmail stamp was distributed for sale.

The whereabouts of only 85 of the famous upside-down stamps are known today, and their value has escalated rapidly over the years. A block of four (there are seven such blocks known to exist), which is the largest multiple of this stamp, was purchased in the 1960s for $100,000; singles sold for about $4,000. Today, single copies of this stamp sell for more than $100,000.

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