(1977-78) Dollar Pattern - RB-1360, GOULD

Coin Details

Description

Reed-Brenner 1360 is a Gould Inc. dollar-sized experimental pattern at the upper boundary of the tightly spaced RB-1350-1360 cluster. Along with RB-1335 and the nearby RB-1370, this piece completes the RB-1300 alloy family, which represents one of the broadest composition groups in the Gould program. The four-piece fine cluster (1350/1355/1360) plus the two outliers (1335 and 1370) indicates that Gould identified a promising base composition in the 1300 range and then bracketed it with systematic variations at two scales: coarse (1335, 1370) and fine (1350, 1355, 1360). This dual-resolution approach is a hallmark of rigorous metallurgical research, where coarse screening identifies the general composition range and fine screening pinpoints the optimum within that range. The resulting data allowed Gould to present the Mint with a complete performance map of the 1300-series alloy family.

Rarity Notes

R-7. Very rare. NGC census records an image, indicating at least one certified specimen exists.

Cross References

Reed-Brenner RB-1360; Gould Inc. experimental program; cf. RB-1350/RB-1355 (fine cluster), RB-1335/RB-1370 (coarse outliers in the 1300 family)