Carl Goldberg, Haida, ca. 1900

Carl Goldberg was one of the most versatile refiners out there, mastering almost every technique imaginable. They did a lot of this metal oxide reduction type decoration (don't ask me how it's done, I don't know) :). One of my very first CW posts was a vase in this shape embellished with a deep wheel-cut lattice on the bottom half. Here, they employed a technique where a floral design is left untreated, then it is overpainted and outlined in enamel, leaving a see-through floral on two sides.