Correction for yesterday’s button: Adelaide Steamship Company
Thanks to Don for the identification. Sure enough, the Australian National Maritime Museum has an example online …
According to Wikipedia, it was formed as a cargo and passenger company between Melbourne and Adelaide in 1875. In the 1930-40s it diversified, including the formation of Adelaide Airways in 1935, which was one of the founding airlines that merged to form Australian National Airways (ANA) in 1936. The company was liquidated in 1997.