British proposal for an anonymous turret&broadside ironclad in 1867

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Length between perpendiculars 380 feet. Burthen 7,571 68/94 tons. Visible 2 Coles turrets on an armoured citadel, so perhaps a preliminary design of the turret ship HMS Devastation of 1871.

Source

Website Royals Museums Greenwich Collection search. ID NPC8800.