I recently purchased this from the good Dr. DiComo.
Sharing: Scarce choice XF U.S. 3 Cents 1857-1860 Plate 9, early state with much going for it!
#26, Deep Rose Brown from Sept./Oct. 1857, Relief F, bottom row copy with Chase-notations on reverse denoting "Slip 'J' Bottom Row".
I have plated this to 100R9e, which has a complete doubling of the left frame line from top to bottom, a partial doubling of right frame line seen at bottom, and the known frame line slip No. 18 - which at the time when Chase discovered he referred to as "J"
Stamp cancelled with a neat blue manuscript "X" mark, which does not detract from viewing overall design and impression.
Also has a slight "offset" on the reverse, from when newly printed pane was placed atop the pile of recently still "damp" printed panes.
Note: DiComo also identified another frame line slip (he is calling No. 18a) of the right frame line opposite the UR rosette, which on later copies is not easily visible. The engraver tried to strengthen the RFL and slipped a few times.
Overall: a stellar example of Plate 9e, deep color and early impression, with engravers slips, LFL doubling, offset on reverse, Dr. Chase notation, light manuscript colored cancel, four margins all around, no thins, no tears, etc. "They do not come any better than this" - Charles DiComo
Relief F-Used for the sixth and tenth horizontal rows. The stamps from the sixth row usually show a guide dot near the lower right corner. At the top, the line defining the top of the white oval shows a tiny break squarely below the interval between the S and P of POSTAGE. At the bottom, there is a break the same, or almost exactly the same, as in Relief E. The E and F Reliefs are the most difficult to tell apart.