Briefly dipping back into this has reminded me how big a lottery it was.
Both the name reference to Cox & King’s Bank and the Waterloo Place address proved a bit of a diversion. The company was Cox & Co for a very long time until after the Henry King takeover, not becoming Cox & Kings until 1923.
From their early Cox & Co days (when he operated from his house) they had 2 addresses (long before the Chatwood door connection here), with Charing Cross being the main office from 1888 until after the Lloyds Bank takeover in 1923, when they moved to 6 Pall Mall. From what I’ve trawled back up Waterloo Place doesn’t really seem to show up with any substance until Lloyd’s recent move in 1991.
Incidentally Cox & Kings has an impressive history in its own right, for anyone who might be interested, the Duke of Wellington and Winston Churchill being famous clients.
As “crude” as any such early laminated round door might have been, it would still be great to uncover anything more about it.