have no backs....most scraps DO have a back print....
These "YELLOW/BROWN" S.C 460 Factory #30 no overprints came off either 1 or 2 sheets that had survived the garbage pile.....50 % of these (roughly) are very damaged and looked "burnt".....rumor has it that the half was in a card shop where there was a fire and water damage....the yellow brown sc 460 f. #30's, there are approx. 50 + that survived(CHRIS might have the exact count)....
altho you "see" them, they are EXTREMELY RARE....collectors have not even realized the rarity of them yet(altho some have
).....
Alex, printer's scrap T206 and other issues are merely "test" runs....and used to set up the presses....THE irony is that 100 + years ago, these were in the "SCRAP" pile
...thought of as "garbage" back then...
now...they are coveted as some of the rarest, coolest of the T206 issues by a growing mass(ME BEING THE BIGGEST PROPONENT)