I think this photo speaks for itself. The torpedo is probably being loaded onto HM Submarine L3 as the photo is from the 1928-1929 album of its Commander, W.R. Fell.
Get Gwulo's books
Download free sample chapters, or buy the books:
Directory
Click on your area of interest to choose from over 30,000 pages about old Hong Kong:
Or choose a popular article:
User login
Navigate gallery
Random photo
Boat yards at Cheung Chau