There is at least two surviving Civil War era turrented ironclad/ram ships. Built in 1868 in Glasgow, Scotland, HNLMS Buffel was the first ship of the Royal Netherlands Navy. It was an stream powered turrented iron clad/ram. It is now at a maritime museum in Rotterdam, Holland, completely restored. HNLMS Schorpioen is a sister ship of HNLMS Buffel and is located at the Naval Museum in Den Helder, completely restored.

http://www.hnsa.org/ships/buffel.htm

http://www.hnsa.org/ships/schorpioen.htm

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David Upton