Keywords: LeatherResearch 026.jpg Investigation of merits of sharkskin leather by means of actual service tests Upper of left shoe is made from calfskin leather and the upper of the right shoe from sharkskin leather This pair was worn for six months Note the smooth appearance of the sharkskin leather demonstrating its resistance to scratching and scruffing National Institute of Standards and Technology 1921-01-01 National Institute of Standards and Technology PD-USGov-NIST PD-USGov National Bureau of Standards National Institute of Standards and Technology Leather Leather shoes |