The term Antique Telephones in the UK tends to be used to describe old telephones made before 1960. These begin with the British Candlestick telephones known as Tele 150's introduced in 1924. This was the PO's first standard table phone.
Then later the first elegantly curved pyramid shaped Bakelite telephones called the 200 series telephones , were introduced in 1929 and continued in production until 1957. Although these were the first bakelite telephones to appear in the UK they did not contain internal bells. They used seperate bakelite bell sets.
The last and often regarded as the most iconic model of antique telephones were called the 300 series telephones and were again made out of Bakelite. The classic 300 series bakelite telephones were produced between 1937 and 1959 and these are what most people think of as Antique Telephones. These were also the first Btitish Telephones to contain an internal bell.