Map; pocket Underground map, by H C Beck, 1949

1949 Underground map (Diagram of Lines) by H C beck - Northern line extension to Bushey Heath included plus the Alexandra Palace line and Bakerloo extension to Camberwell.

This edition shows the Metropolitan line in purple and the Circle line in yellow. The Central line extensions are completed to West Ruislip in the West and Loughton in the East. The Bakerloo line is shown with the proposed extension to Camberwell. White line connectors are used for the first time to represent interchange stations. The Waterloo & City Railway is drawn as a white line with black edging and the eastern end of the District line is shown to Barking. The River Thames is drawn using thin blue lines.

On the reverse there is a diagram of Central Area Interchange Stations with circles to show the interchanges.