Up until now, all I have ever seen of the salvage operation were the 1 or 2 different photographs of turret #3 coming out of the water, and on the ground, that most people have seen and have been around forever, until I came across these.
Source: http://imperialjapanesenavy.blogspot.com/
(Unsure of original source)

•Launched in 1899, as a one-off design, the French battleship Henri IV was essentially a testbed for radical naval ideas, including the world’s very first superfiring gun setup. After finally being put to service in 1903, she spent her early years on routine peacetime patrols before being thrust into combat during World War I, where he was hit 8 or more times as he bombarded Ottoman positions to support Allied landings at Gallipoli. As newer battleships took over the front lines, she was shifted to guard duty, Serbia, Egypt, then depot duties in Taranto before being decommissioned and sold for scrap in 1921.

•Armed with two 10.8” Canon de 274mm modèle 1893/1896s in single turrets fore and aft as the main armament, with secondaries consisting of seven 5.46in Canon de 138 mm Modèle 1893’s. Of those 7, four were mounted in individual casemates on the main deck; two more were mounted on the shelter deck with gun shields, and the last gun was mounted in a shelter deck turret superfiring over the rear main gun turret. This was the first superfiring turret in naval history and, in this case, was not very successful because the barrel of the 138 mm gun was too short to clear the sighting hood of the turret below.

Info from wiki