||The color differences between the government Gray of the top masthead compared to the commercial tan 2065 masthead below it. As the story goes the first time the black body thirteen stripe logo was seen by management, it was painted over and photographed as a black block logo on tan background on a black bar. This color combination was used on the mock ups used in the 1964 introduction.
When the demand that all logos be tan, not black. A single masthead was made using the 13 stripe logo on a tan background. As it turned out, by then production was using the black 13 stripe logo on all of the second generation System 360s starting in about 1967. The logo was soon changed to the modern 8 stripe logo with the introduction of the System 370 family in the early 1970s. The System 3 introduced in 1969 used the thitreen stripe logo.