1978 Gibson Quality / Prestige / Innovation catalog, page 23. Details of the Howard Roberts Artist and Howard Roberts Custom. Howard Roberts had been working with Gibson and sister company Epiphone for many years, but the mid/late 1970s were a particularly fruitful time for the partnership - Roberts had appeared on the cover of the 1975 Custom Order and Electric Acoustic catalog with the then-new Howard Roberts Custom. In 1976, a more ornate model with gold hardware, the Howard Roberts Artist started shipping - though the partnership would spawn perhaps the best known model, the Howard Roberts Fusion in 1980.
US 1978 list prices for these models were: Artist $1299 ; Custom $1099.