See the original photo on Flickr.
industrialhistoryhk.org refers:
Determined to have its own property, Dragon Seed acquired five storefronts at 39 Des Voeux Road next door and with the help of Peter’s son Gilbert who was trained as an architect in Australia developed the 15-story Dragon Seed Building. The building opened on December 1964 and Dragon Seed opened its new flagship store on the first four floors of the building while conducting a removal sale at its original store next door. The new store would be the firm’s flagship store for the next three decades.
So the photo is likely from the second half of the 1960s.
Date picture taken
1960s
Gallery