From World Tennis
magazine, December 1971:
L-R: John Newcombe, Wimbledon Wilhelm Bungert, Rod Laver
Newcombe featured name printed on tongue but no Newk face image. Looks similar to Stan Smith with perforated 3-stripes but the toe box is reinforced with extra leather whereas the Smith is not.
Bungert featured blue and red stripes. The sole looks like the one used on adidas Gazelle shoes. Kangaroo leather which later was used and marketed on the "Forest Hills" shoe as "Kangoran"
Laver shoe looks unlike the one we know today but did feature the non-leather uppers.