Scale 1:48. Plan shows the upper deck as fitted for the modified Black Swan class sloop Amethyst (1943). An Alexander Stephens builder's stamp, dated 16 March 1944 is printed on the left hand side of the drawing. A Alexander Stephens Principal Ship Overseer's stamp, dated 16 March 1944 and bearing the overseer's singature is also printed on the plan. A Devonport Dockyard Manager of Constructive Department stamp dated 18 August 1950 is printed on the drawing. This plan also shows alterations made in burnt sienna ink at Devonport Dockyard dated August 1950.