Three panel passenger map, 15 x 22.5 cm, printed in colours. Covers a touch dusty but a respectable example. On the reverse is an enlargement of the central area with interchange stations named inside large diamonds.
Beck designed most iterations of his famous diagram between 1933 and 1960, with only a short interruption between 1938 and 1941. This is a typical 1930s issue with a deep blue border and 45 degree angles. The red notice drawing attention to the escalator connection between Bank and Monument was introduced in September 1933 and still dominates the upper right hand corner of the map, but it was less prominent in later issues.