. . "Jacob's Oil and Leather was a business based in Boston, Massachusetts that sold Jacob's Whip Repair. They advertised out of the classifieds section of National Geographer Magazine in 1935."@en . . "Jacob's Oil and Leather was a business based in Boston, Massachusetts that sold Jacob's Whip Repair. They advertised out of the classifieds section of National Geographer Magazine in 1935."@en . . . "Jacob's Oil and Leather"@en .