London Transport Underground Railway Map by H C Beck. Printed and published for London Transport by Johnson, Riddle and Company, London 1937. On folding card size 23 by 15 cm. when opened. A 1st edition of the Beck pocket map issued free by London Transport. A map of the tube network in colour to one side that includes a key to seven underground lines and interchange stations and an inset panel listing stations beyond Bow Road on the District Line. With a stylised map to the reverse showing the interchange stations in the central area with a colour coded key to the 7 lines and symbols showing interchange and main line stations. Minor nick to the base of one fold but overall VG condition.