1879 Trade Dollar. Proof-66 (PCGS). CAC. An extraordinary example to represent both the type and issue. Both sides are beautifully and originally toned with flashes of cobalt blue and pinkish-apricot iridescence blending with dominant olive-copper patina. The strike is full throughout, and the surfaces are expectably smooth for the assigned grade. One of the most popular high quality type candidates in the trade dollar series, the 1879 inaugurates a run of Proof-only dates that would continue through the series official end in 1883. This upper end Gem is a conditionally rare survivor from a mintage of 1,541 Proofs that is sure to catch the eye of discerning bidders.