1879-S Morgan Silver Dollar, NGC MS64. Gorgeous rainbow obverse toning on this Morgan Silver dollar. Popular date with exceptional rainbow toned obverse. Collectors AND investors seek out coins that have nice toning. Nice toning on the obverse is worth a premium. Rainbow toning on the obverse of a coin is what all of us in the business are prepared to pay a premium for. Much much more desireable than reverse toning. It's extremely tough to find a Rainbow Toned Morgan Dollar like the specimen shown here. Reasonably priced at... $375.00