Jason,
thats the "SILLIVAN" error...LOL....
these name field misprints are cool...this particular one would not carry that much of a premuim, maybe a $30-$40 card or so, but others do, you are correct...
if you could locate a few others, then you might have something, keep searching and collect afew if they are out there.....something obstructed the name field print, or stone might have been damaged....
similiar to the "nodgrass" but clearly depends on the recognition or press....the doulbe struck letters are also cool , i have an anderson with 2 "A"'s in the name field.....also, i have 4 hemphills with half "h" and "e" in the name field, all with different backs......(some collectors already started to recognize the hemphill).....there are also a few others out there, Trae Regan and Jantz can add more about them ...
these t206 anomalies are great
, usually the more dramatic the error, the more value they carry.....i'll see if i can post some scans later....
Peace
Johnny