This is USS Roanoke, the most heavily armed monitor commissioned by the Union during the war., a task accomplished by essentially cutting down USS Roanoke, Merrimack's sister ship, and configuring her to an ocean going monitor. Unfortunately, in this case, John Ericsson's ego ruined what was a potentially brilliant design into something of an engineering nightmare. Originally intended for four Coles type turrets, Ericsson took advantage of British reluctance to sell Coles turrets to the USN and pressed for a re-design, adding three turrets, re-arranging machinery, but not bothering to re-adjust the original hull and load bearing structures beneath. This resulted in a structurally unsound vessel that took on alarming amounts of water while at sea and had an unfortunate tendency to dismount all her guns if firing a full broadside.... James B. Eads unsuccessfully lobbied to have her re-armed with Eads turrets, an effort that might have saved the whole endeavor, but as many scholars of the period will tell you.... Ericsson could do no wrong in the eyes of Gideon Welles.
Nevertheless, she was quite a threat, spending most of the war at Hampton Rhodes, and preventing more than one CSN breakout attempt. She was even the apparent target of a half-cocked Confederate scheme to capture or sabotage her. One Union officer, when informed of the plot after the war, wryly commented that the Union should have allowed them to steal the ship... "it may have ended the war earlier."
Still a perpetual favorite with wargamers, she could easily have been quite more functional if only proper attention had been paid in her redesign. Indeed, Admiral Dupont specifically requested her for his ill fated attack on Fort Sumter in April, 1863, and was only overruled when the Monitor was lost at sea in transit to take part in that same operation.
At the end of the war, Roanoke returned to her home port of Manhattan and remained the flagship of the New York City Port Authority until the late 1870s, when she was stricken and eventually scrapped.
Historically, Roanoke was painted in two schemes, though it's a bit fuzzy as to which was used when. In one version, Roanoke was primarily black, with white turrets and pilot houses, and canvas turret awnings; her other documented scheme was similar, with the exception that her prominent frigate bow and the outline of her hull was painted in white, with a white identification band around the top of her stack. It is possible that her galley stack (or secondary stack, if you prefer) was painted in one or both iterations. We at black Army (all two of us) believe that this is the most accurate rendering of Roanoke to date in 1/600 scale. While others are very beautiful indeed, most tend to miss some of her cogent details, her turrets are often oversized, her frigate bow rarely depicted, and her awnings, which are seen even in photos of Roanoke at sea, forgotten.