This intrigues me.
First, Welcome to TreasureNet!!
Second, Playa Gemelas, PV; I first got to PV in 1965; then it was beautiful and 'native'.
Third, I know you have shown this piece around. Did you ever get the piece assayed for gold enlay?
Fourth, the Gulf Islands you refer to may be Charlotte's Island in British Columbia, Canada--right?
If so, the story of a Spanish galleon may have been 'expanded' from this story:
In June 1859 a shipwreck occurred on the West Coast of Queen Charlotte Islands, BC. The three crewmen made it to the shore and began to search for food. During this search they found a small barren island about 50ft offshore. Noticing a yellow glint, one of them swam out to the island and returned with the news that the island was covered in gold. They built a small cabin and stored the retrieved gold under the floor. The estimated they had stored about a ton. They were then attacked by hostile indians and one of the sailors was killed. After hiding out for a while the remaining two managed to get safe passage to Fort Victoria. After telling their tale an expedition was set up to return. Upon returning they found the body of their friend, but no cabin, no gold or small island. Did the Indians burn the cabin, was the gold found...who knows. Note: In 1851 many vessels had set out for the Queen Charlotte's with miners on board, gold had allegedly been found there and the panic was on.
Don,.......