This historic postcard captures a powerful British Railways steam locomotive, the "Merchant Navy" class No. 35017 "Belgian Marine," at King's Cross Station in London. Dating from the significant 1948 Locomotive Exchange, it shows the impressive 4-6-2 engine departing on the Leeds express. This piece offers a fascinating glimpse into the golden age of British rail travel and a notable moment in railway history. Depicts the S.R. "Merchant Navy" 4-6-2 steam locomotive, No. 35017 "Belgian Marine." Documents the British Railways Locomotive Exchange of 1948, featuring the train leaving King's Cross on the Leeds express. Published by PHOTOMATIC LTD., Bradmore Green, Brookmans Park, Herts. Original photograph taken by C. C. B. Herbert.