This is a poster for the remaining “inverted Jenny,” one of four rare stamps featuring an airplane printed upside-down and stolen in 1955. The third of the four stamps was handed over to the American Philatelic Research Library Thursday.associated press

NEW YORK — Six decades after it was stolen from a display case, a rare “inverted Jenny” stamp with an estimated value of $350,000 was returned by the Justice Department in a ceremony at the Javits Center on Thursday.

The 24-cent postage stamp was issued to celebrate the start of airmail service in 1918 and displayed a Curtiss JN-4H “Jenny” biplane, but one sheet was mistakenly printed upside down.

The recovered stamp, one of a block of four on loan to the Philatelic Research Library that was snatched during a 1955 show and broken apart, resurfaced in April when it was consigned for sale.

The man who consigned it, said he had received it from his now-deceased grandfather and knew nothing about its origin.

He agreed to its return, and is in line for a $60,000 reward.