Just how early are the underground extensions?

I've been using Kilburn Park tube station on the Bakerloo Line quite a lot since I moved and the most striking things about it is the tiling and the colour.

Having lived and worked in Stoke-on-Trent I have a very strong sense of admiration for the colours and types of glazing having seen something of the production methods and skill that went into this sort of process.

There is also the control box at the platform join at the bottom of the escalators, but the colours of the tiling are really strong and vibrant.

The control box is clearly of-a-type - it reminds me of the benches (was plural now singular) on Belsize Tube platform northbound), similar to the office at the top of Kilburn Park escalator on the righ as you come up and was probably the standard mahogany finish for the London underground in this era and that was maintained throughout and since.

Kilburn Park Tube is much earlier than many realise - it feels 30's, looks earlier (perhaps 20's) and in fact is very late edwardian (architecturally at least!).

The section from Paddington to Kilburn Park was opened on 30th January 1915 and the further extension from Kilburn Park to Queen's Park opened on 10th May 1915.