I've tagged it as a "Saluting Battery", based on the 1936 clipping. I don't know if it was ever used as a defensive battery when it was first built.
Some more notes about it in this thread: http://gwulo.com/node/9622
Download free sample chapters, or buy the books:
Click on your area of interest to choose from over 30,000 pages about old Hong Kong:
Or choose a popular article:
A timeline of Places at this site.
Go to: Top of page | Home | What's new