Different design of box here in Ramsgate near to the Queen Victoria Pavilion from the mid 1930s next to the underground public toilets.
The box then move a few feet nearer to the pavilion next to the phone box by the 50s.
Not sure how this fits with the concrete box above which reportedly was sited on the Canterbury Road. Perhaps they used the wooden Norwich built boxes initially and then moved to a concrete box for later additions to the network.