I want to know the answer to the following question:
In what year was the local postage stamp overprinted and has since been replaced?
All the background I'm provided with is that "In 1899, the local postage stamps were overprinted "Guam" as was done for the other former Spanish colonies, but this was discontinued shortly thereafter and regular U.S. postage stamps have been used ever since.". Is that enough to answer the question?
Answer: yes