$1.00 Pink W die (RN-W6), imprinted at center with 5c Pink P die (RN-P var.) on 1871 $1,000 Lake Superior Ship Canal, Railroad & Iron Company (Michigan) bond, 16¾ x 10½", engraved by NBN Co. in Brown & Black on front, Green on reverse, with beautiful central vignette depicting sailing ships, with 60 coupons attached (overall size 16¾ x 27½"), the bond has been expertly and extensively restored, (trifle heavy file folds with a faint tape stain along the central vertical fold), tiny trivial piece out of the $1.00 stamp, otherwise fine, illustrated in Castenholz, an extraordinary rarity, believed to be unique, listed but unpriced in Scott, Castenholz $2,500.00 est.