This antique sterling silver fish knife / slice serving piece is the 1862 Gibney pattern.  The serving knife measures 12 inches long, has a pierced blade with cusped and waved right edge.  The design is very similar to the Union pattern by John R. Wendt.  The backstamp reads "Ball Black & Co STERLING PATENT 1862".  Has B monogram, excellent condition, very minor rubbing on a couple of high points. Thank you for shopping with us for antique silver...