1879 Beautiful Naturally Toned Gem Proof Trade Dollar NGC PR61. Although the holder says 61, I believe this should grade PR63 if submitted to PCGS. No two rainbow naturally toned proofs are alike. This one is real special. The reverse grades PR65 in my eyes and PR63 on the obverse. All proof trade dollars are rare and to find one with such lovely natural toning is very special. Guaranteed to please and delight any collector looking to build a set of naturally toned proof trade dollars or a type set of naturally toned 19th century U.S. Proof coins.