Boss formed cases by rolling sheet metal as opposed to the traditional method involving soldering and cutting. Rolling increased the molecule density of the metal. His patent, No. 23,820 of May 3, 1859, revolutionized the watch case industry by enabling the production of not only less expensive, but considerably stronger cases. ... Unlike gold washed cases, which were made using electroplating, cases produced by means of rolling had much harder gold surfaces and were thus less apt to wear.