Wardley House / HSBC Headquarters Building (1st Generation) [1857-1882]
From the Bank's website:
The bank owed its origins to the business communities of the China coast in the 1860s. At that time, the finance of trade in the region was not well developed and most transactions were still handled by the European trading houses, or hongs, rather than by professional banks. By the early 1860s, local businessmen needed larger and more sophisticated facilities. In Hong Kong, in particular, business leaders required specialist banking services — preferably from a bank that was locally owned and managed.