Page 18 - Demo

The Jupiter stamp was printed on pregummed paper using a Giori Press. Prior to this, it was difficult to align each color on multicolored stamps, because every color required it%u2019s own printing plate. With the revolutionary Giori Press, multiple colors could be printed at one time from a single plate. This eliminated all registration problems. Gualtiero Giori%u2019s invention was developed after WW II, and In 1949, one was used in Argentina to print postage stamps for the first time. The U.S. Bureau of Printing and Engraving acquired one in 1957, and the Jupiter stamp was the first Air Mail stamp printed on it.The Jupiter stamp was produced in large 200-stamp sheets, with every sheet having a printing plate serial number in the selvedge of each of its four corners. After being perforated, the large sheets were cut into quarters, each of which contained 50 stamps with one plate number printed in the selvedge. The stamps were now ready for distribution to Post Offices. The Jupiter stamp%u2019s initial printing was on June 15, 1959, using plate numbers 26390 and 26391. A second printing was on June 19, and used plate numbers 26392 and 26397. A matched set of plate-number blocks is defined as four blocks (each containing four stamps), with the same plate number in the selvedge, but in a different corner. Thus, each block originated from a different corner of a single large 200-stamp sheet. This collection includes one matched set for each of the four different printing plates utilized.A Giori printing press.