After looking at maps of round-the-world trips with Google Image Search, I now think this map represents the stops on some famous world tour. I can't find any reference to it, unfortunately.
Rick Prelinger / @footage
Prelinger Archives, San Francisco http://www.prelinger.com[log in to unmask]
Associate Professor, Film & Digital Media, UC Santa Cruz
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Prelinger Library (http://www.prelingerlibrary.org), a member of the Intersection Incubator, a program of Intersection for the Arts providing fiscal sponsorship, incubation and consulting to artists (http://www.theintersection.org).