in 1906, the 1c, 2c, 3c, and 4c values were surcharged 10c, 15c, 25c, and 50c, using a box with the value and "1906". a 1907 set of 16 values updated to a profile of an older alfonso. several of these values were surcharged between 1908 and 1910. a total of 72 issues are identified in the yvert catalogue. stanley gibbons lists 69 issues from 1903 to 1909.