Scale 1:48. Plan shows the upper, forecastle decks and bridges, as fitted, of the G class destroyer Glowworm (1935). A John I. Thornycroft Naval Yard stamp dated 20 February 1936 is present on the left hand side of the plan. A second Thornyvroft stamp, with the signature of the Principal Ship Overseer, dated 2 March 1936, is also included on the drawing.