Fine, long sterling and 9K rose gold necklace

Each link comprises a backing of pierced and hand-filed silver fused to a top portion of gold. It has a great feel "in the hand" and lies flat on the neck without kinking or fussing. The only mark appears to be "372 B" in a tiny hexagonal punch. I suspect that it is Spanish, and the B stands for Barcelona, but wouldn't stake my life on it. At any rate, we're hard pressed to think of a more attractive necklace that's ever passed through our establishment. And with the price of gold soaring as it is, we're beginning to wonder if this might not be "under melt." Length 18+ inches; superb condition.