Coin silver sugar shell "Grape" pattern

Coin silver sugar shell in a pattern that might be called "Grape" because of the 2 bunches of grapes and a grape leaf at the end of the handle in the cartouche. Quite likely an unidentified pattern by John Pohlamus of NYC. Engraved on the reverse "LKB" in script. Marked "A. SANBORN" incuse for Amose Sanborn of Lowell, Mass. ca. 1850. Also marked "PATENT.1850". Excellent condition. Slight wear on the drop and some of the design slightly rubbed.