These are Canal Zone J8 and J9, the 2c and 10c red overprint postage due issues of 1915, with spacing varieties. J8 has both the normal "2" position and with the "2" shifted 1/2 mm to the right (Canal Zone Study Group J8.2 (one has short perfs, one has a stain and small tear at top) and J9 has both the narrow (CZSG J9.A) and wide (CZSG J9.B) spacings between the "1" and "0" of "10" (each has a couple short perfs, one has a small scrape and the other a crease).  Still useful for identification and collectible as stamps. Scott $25 as regular singles. A great addition to a Canal Zone collection.