Scale 1:48. Plan shows the plan view and sections, as fitted of the L50 class submarine L52 (1918). A Sir W. G. Armstrong Whitworth builder's stamp, dated 23 March 1921 is printed on the drawing. A faded Admiralty Overseer stamp bearing the signature of T. H. Bentley is also printed on the drawing. The plan shows the sections at Frames 75, 92, 108, 128 and 135 looking aft. The drawing also shows the sections at Frames 8, 25, 40, 50 and 64 looking forward.