Complex sentence: The vast majority of the original 1930--38 production run of Model 202 phones were produced in a single color--black--but for an extra fee, telephones and subsets could be ordered in numerous other colors, both metallic and flat.
Split into simpler sentences: The vast majority of the original production run of Model 202 phones were produced in a single color: black. For an extra fee, telephones and subscriber sets could be ordered in numerous other colors, both metallic and flat.