The 10¢ stamp whose date of issue was March 19, 1869, but it’s earliest known use is April 1, 1869, has as its largest known unused multiple, a horizontal imprint block of 15. There are numerous used blocks of four. The 10¢ stamp is known to be used on domestic mail but was not primarily used for domestic rates, but was often used for the 10¢ rate to Germany and France. It was also used on covers to China, (paying the 10¢ Trans-Pacific rate) to Japan, from Japan and from China, as well as to and from various destinations in the Caribbean and South America. It also has been used to make up the larger foreign rates on covers to such places as Peru, Italy, Syria and Spain.
