1937-D Oregon Trail Memorial. MS-67+ (PCGS). CAC.Whereas the reverse is lightly toned in pastel iridescence, the obverse is boldly and richly patinated in mottled reddish-copper, rose-russet and sea green. Easily among the most visually appealing examples of both the type and issue that we have offered in recent sales, and worthy of the strongest bids, as such.