Doc, the early brochure I have is the MB-North America brochure from 1972, showing the "350SL" with 4.5L engine, 280SE, 280SE/SEL 4.5, 300SEL 4.5, and 600. The 350SL is solid color in what I think is Icon Gold, 419. The brochure doesn't identify a year, but as far as I know 1972 was the only year that the "350SL" along with the 108 and 109 bodies coexisted.
The later brochures I have are the entire MB-NA dealer's kit from 1989, with brochures on the S-class (including the 560SL), the 190 class, the 190 class, a separate colors brochure, and assorted other marketing and specifications pieces. The 560SL in the S-class piece is solid-color white, unmistakably, in each of the three photos that show a side view. Unfortunately, there are no views of a two-tone car, but to the best of my memory the break was at the side trim molding, with the second tone showing only below that and below the bumpers front and rear, as on your car. The color brochure doesn't specifically identify two-tone combinations. The 190-class shown are mostly two-tone, as are some of the 300-class, both with only the lower body in the second color. The 190's show usually white above, medium gray below, while the 300's show the lower body in a mildly darker tone of the upper body color as far as I can tell.
That covers the first and last years of 107 production; I have nothing about what happened in between!
Craig