The opening date comes from an article in the Hong Kong Daily Press, 1886-08-14, pg02, which reported the opening of the Bank's new building on that day. (Though to be 100% correct, the article notes that "although the Bank is being removed into it, the building is far from completed, and it will not be finished, at all events, within six months."
Other notes from the article:
- The site for the new building consisted of the site of the previous HSBC HQ building, plus the site of the "tenement belonging to the Chartered Mercantile Bank", which HSBC had acquired.
- Design was put out to competition and "After a careful consideration of the plans submitted the choice of the Directors fell upon one which had been prepared by Mr, Clement Palmer, of the firm of Messrs. Bird and Palmer, of this colony, [...]"
The demolition date comes from an article in The China Mail, 1933-11-02, pg 09:
"[...] the Hong Kong and Shanghai Bank Building, with the exception of the granite columns at the front and rear, has within three weeks, been all but razed to the ground."