A Whaler Made Whalebone Ship’s Block and Seam Rub Consign Now Dept19th Century ScrimshawSizeLength 4 ¼ in. and Length 6 ½ in. Lot 421:Whaler Made Whalebone Double Sheave Ship’s Block, circa 1850. Length 4 ¼ in. Lot 422:Large Whaler Carved Whalebone Seam Rub, circa 1850, polyhedron knob octagonal grip and a reeded wedge, from a sing piece of bone. Length 6 ½ in. Please note that this auction has ended. Click here for an overview of this auction.