TURRET FOR TWO 600 POUNDER GUNS designed by Capt Cowper P Coles, 1865.

Scale 1:12. Drawing showing a top-down view of a turret for two 600 pounder guns with 5.5 inch armour plate. The plan is divided into sections:
Top half is the plan of the top of the turret illustrating the vents and sight holes;
Bottom left quarter is a part plan showing the rollers for the turret;
Bottom right eighth is a part plan showing the centre of the port with armour plating;
Bottom left eighth is a plan showing the 1/2 inch plate on top of short frames.

See NPC9581 regarding alternative thicknesses and weights of armour (and NPC8567, NPC8709, NPC8710, NPC8711 for the relevant plans).

Drawn and signed by J (Joseph) Scullard, Head Draughtsman, Portsmouth Yard.
Endorsed by Cowper P Coles, 18 November 1865.

VERY FRAGILE AND TORN.