The regal technological milestone was passed as the Queen attended the opening of a new gallery at the science museum in London.
One set was made in England for the science museum in the two years 1928 and 1939.
The science museum drawings show the tube section threaded and screwed into the castings.
The science museum did have constructed from its own drawings a very fine replica which is completely operable at this time.
The visit to the science museum could be an attempt to bowl them over with an eon-long vista of Ryke superiority in the sciences.