Hi Jdye,
The last date would be from your Royal time line of 1901 when Queen Victoria's rein finished and the prince became king.
I don't have any 'proof' that Schweppes was appointed supplier TO THE QUEEN and TO THE PRINCE OF WALES however Schweppes was a huge company with many different styles and types of bottles and a lot of them had Appointed to the King, Queen etc embosses on them.
Most companies stopped using the stone Ginger Beer bottles and moved onto using glass bottles around 1930, Schweppes included.
I don't know of any fake Schweppes bottles, most of the Schweppes bottles are fairly common and would not be worth making forgeries of them. This does not mean there are not fakes just means I have not seen one.
