Lego's egalitarian instructions from the 1970s

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This is going around the 'net like lightning. It's wonderful, but is it real? How likely is it that Lego would have used a proportional Times-esque typeface--with such sloppy layout--in the early 1970s? Here it is compared to one cut of Times New Roman, which is very similar (including that flat serif atop the p)

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And on the other side, faintly visible through the paper!

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Update: Convincing evidence of its authenticity, courtesy of BB reader walt74.

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