Antique Scrimshaw Tooth with "Greasy Luck" Whaling Scene

Antique sperm whale tooth titled "Greasy Luck" and depicting a whaling scene with superb attention to detail circa 1850. Image wraps around bottom of tooth and shows quarter bow view of a whaleship, 4 whaleboats in action, whales (one with marked flag), another whaleship in background, and mountain shoreline. Main whaleship flies a "B" flag. A geometric border above completes the engraving. American or possibly English circa 1850.
Unknown artist; a scrimshaw tooth by the same hand is in the collection of the Nantucket Historical Association (#1977.0232.001). Measures 4-3/4": tall.