This is a sturdy barograph in an enclosed polished oak case, manufactured to an exacting standard by approved makers, Wilson, Warden & Co. Ltd of London and  issued by the British Met Office for the Air Ministry. These were typically issued to RAF airfields and regional weather stations during the Second World War and follows a design standardised in the late 1930s - this example is engraved on the brass base with the reference No 4155/43 (ie, first issued in 1943) and assuming it was operational the following year it would be most likely to have contributed to the weather forecast planning for the D-Day landings - what a nice legacy! The period Met Office clock is dated 1940. The hardwood case is in its original condition. The lacquered brass movement is lovely and in excellent working order. The original ink bottle and the brass dipper with its holder make the instrument complete. There is a narrow pull out drawer to the side to store spare pen arms. 
See pictures extracted the first edition of the Met Office Handbook of Meteorological Instruments showing this barograph pattern and the clock.
A selection of weekly charts and a fresh bottle of recording ink included and a reprinted copy of a 1930s pamphlet by Negretti & Zambra detailing operating instructions and interpreting various chart recordings.
312mm wide x 152mm deep x 195mm high.